E-Day Alternative Project: Energy

Last updated about 1 year ago

29 questions

Note from the author:

Instructions

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Library

E-Day Alternative Project: Energy

Last updated about 1 year ago

29 questions

Note from the author:

Open your textbook to Unit 9 pg 150 on Energy
Work your way through the Formative, following the instructions and answering the questions as you go.
For this entire activity, take gravitational acceleration to be 9,8 m.s-2.
PLEASE ENSURE THAT YOU WRITE ALL CALCULATIONS ON A PIECE OF PAPER AND HAND IT IN TO MS BLAIR/MRS KÜHN AT THE END OF THE SESSION. IF THIS IS NOT RECEIVED, YOUR ANSWERS FOR THE CALCULATIONS WILL NOT BE MARKED.

Instructions

Open your textbook to Unit 9 pg 150 on Energy
Work your way through the Formative, following the instructions and answering the questions as you go.
For this entire activity, take gravitational acceleration to be 9,8 m.s-2.
PLEASE ENSURE THAT YOU WRITE ALL CALCULATIONS ON A PIECE OF PAPER AND HAND IT IN TO MS BLAIR/MRS KÜHN AT THE END OF THE SESSION. IF THIS IS NOT RECEIVED, YOUR ANSWERS FOR THE CALCULATIONS WILL NOT BE MARKED.

Watch the video which explains the notes and answer the questions based on the video.

If you are having trouble with the video, click on this link to watch it in drive, and then return here to answer the questions: energy video part 1

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8

Draggable item		Corresponding Item

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What type of energy makes up the mechanical energy of an object when it is moving along the ground?

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What type of energy makes up the mechanical energy of an object when it is positioned above the ground and not moving?

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What type of energy makes up the mechanical energy of an object when it is positioned above the ground and moving?

GRAVITATIONAL POTENTIAL ENERGY

EP = mgh
Watch the clip showing a man lifting a rock to a height of 2 m above his head. The rock has a mass of 1,5 kg. Take gravitational acceleration to be 9,8 m.s-2.

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KINETIC ENERGY

Watch the clip showing a remote-controlled aeroplane of mass 4 kg flying at a speed of 2,42 m.s-1.

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What is the kinetic energy of the plane?

Consider the formula for kinetic energy:

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Watch what happens to an object's mechanical energy when it is dropped (assuming a closed system, i.e. without friction).
Does the following increase, decrease, or stay the same in an ideal situation as it falls to the ground?

Draggable item		Corresponding Item
Mechanical energy		increases
Kinetic energy		decreases
Gravitational potential energy		remains the same

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If the system is not closed, what most likely would the energy be lost as?

Look at the clip showing a cat falling towards earth, from a height of 511 m. Take gravitational acceleration to be 9,8 m.s-2. Assume a closed system.

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What is the mass of the cat? Round your answer to the nearest whole number and use the correct units.

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Look at the clip showing a pendulum swinging. What energy is at a maximum value when the pendulum is in this position (19)?

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Now let's continue watching the video. 

Watch the next part of the video. If it isn't playing in the box below, you can access it on derive by clicking on this link: energy video part 2

In a closed system, the only energy transformations that can take place are between kinetic energy and gravitational potential energy. Therefore total mechanical energy for an object remains constant.

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PLEASE COMPLETE ACTIVITY 9.1 IN YOUR WORKBOOK.
IT IS DUE BY THE END OF TERM 2
THIS SECTION WILL BE INCLUDED IN YOUR MIDYEAR EXAM.

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I acknowledge that I have seen this instruction to finish Activity 9.1 in my own time, due by end of Term 2

Open your textbook to Unit 9 pg 150 on Energy
Work your way through the Formative, following the instructions and answering the questions as you go.
For this entire activity, take gravitational acceleration to be 9,8 m.s-2.
PLEASE ENSURE THAT YOU WRITE ALL CALCULATIONS ON A PIECE OF PAPER AND HAND IT IN TO MS BLAIR/MRS KÜHN AT THE END OF THE SESSION. IF THIS IS NOT RECEIVED, YOUR ANSWERS FOR THE CALCULATIONS WILL NOT BE MARKED.

Open your textbook to Unit 9 pg 150 on Energy
Work your way through the Formative, following the instructions and answering the questions as you go.
For this entire activity, take gravitational acceleration to be 9,8 m.s-2.
PLEASE ENSURE THAT YOU WRITE ALL CALCULATIONS ON A PIECE OF PAPER AND HAND IT IN TO MS BLAIR/MRS KÜHN AT THE END OF THE SESSION. IF THIS IS NOT RECEIVED, YOUR ANSWERS FOR THE CALCULATIONS WILL NOT BE MARKED.

Watch the video which explains the notes and answer the questions based on the video.

If you are having trouble with the video, click on this link to watch it in drive, and then return here to answer the questions: energy video part 1

Match the following scenarios with the most appropriate form of energy:

Draggable item		Corresponding Item
light bulb		chemical potential energy
electrical cables		electrical energy
cyclist		potential energy
petrol		gravitational potential energy
stretched bow		kinetic energy
nuclear power station		radiant energy
sun		nuclear energy
brick raised above the ground		light energy

What type of energy makes up the mechanical energy of an object when it is moving along the ground?

What type of energy makes up the mechanical energy of an object when it is positioned above the ground and not moving?

What type of energy makes up the mechanical energy of an object when it is positioned above the ground and moving?

GRAVITATIONAL POTENTIAL ENERGY

EP = mgh
Watch the clip showing a man lifting a rock to a height of 2 m above his head. The rock has a mass of 1,5 kg. Take gravitational acceleration to be 9,8 m.s-2.

KINETIC ENERGY

Watch the clip showing a remote-controlled aeroplane of mass 4 kg flying at a speed of 2,42 m.s-1.

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1

What is the kinetic energy of the plane?

Watch what happens to an object's mechanical energy when it is dropped (assuming a closed system, i.e. without friction).
Does the following increase, decrease, or stay the same in an ideal situation as it falls to the ground?

Draggable item		Corresponding Item
Mechanical energy		increases
Kinetic energy		decreases
Gravitational potential energy		remains the same

If the system is not closed, what most likely would the energy be lost as?

Look at the clip showing a cat falling towards earth, from a height of 511 m. Take gravitational acceleration to be 9,8 m.s-2. Assume a closed system.

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What is the mass of the cat? Round your answer to the nearest whole number and use the correct units.

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Match the following values of EK and EP for the cat as it falls towards the ground.

Draggable item		Corresponding Item
EK = 20 000 J		EP = 20 000 J
EK = 2 000 J

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Assume the cat has a mass of 4 kg. What is the speed of the cat (in m.s-1) when it hits the ground? Round to nearest whole number (if necessary). No units.

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Look at the clip showing a pendulum swinging. What energy is at a maximum value when the pendulum is in this position (19)?

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Look at the clip showing a pendulum swinging. What is at a maximum value when the pendulum is in this position (20)?

Now let's continue watching the video. 

Watch the next part of the video. If it isn't playing in the box below, you can access it on derive by clicking on this link: energy video part 2

In a closed system, the only energy transformations that can take place are between kinetic energy and gravitational potential energy. Therefore total mechanical energy for an object remains constant.

Use the law of conservation of mechanical energy to perform the following calculations. 

and if the object is dropped 

Take gravitational acceleration to be 9,8 m.s-2.

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2

A 1,5 kg rock has 50 J of gravitational potential energy when dropped. What is its kinetic energy when it hits the ground? Round to nearest whole number and include the appropriate unit.

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2

A 1,5 kg rock is dropped from a height of 10 meters. What is its kinetic energy when it hits the ground? Round to nearest whole number (if necessary) and include the appropriate unit.

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A 1,5 kg rock is falling. When it is 35 m above the ground, its speed is 6 m.s-1. How much kinetic energy does it have at the moment it hits the ground? Round to nearest whole number (if necessary) and include the appropriate unit.

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A 1,5 kg rock is dropped from a height of 46 meters. What is its speed (in m.s-1) when it hits the ground? Round your answer to the nearest whole number (if necessary. No units.

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A 1,5 kg rock is falling. When it is 35 m above the ground, its speed is 6 m.s-1. What is its speed when it hits the ground? Round your answer to the nearest whole number (if necessary). No units.

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A 1,5 kg rock is falling. When it is 35 m above the ground, its speed is 6 m.s-1. What is its speed when it is 5 meters off the ground? Round your answer to the nearest whole number (if necessary). No units.

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How much potential energy does a 1,5 kg rock have when dropped, if it has a speed of 26 m.s-1 when it is 5 meters above the ground? Round to nearest whole number (if necessary) and include the appropriate unit.

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How much mechanical energy does a 1, 5 kg rock which is dropped have, if it has 20 J of kinetic energy and 15 J of potential energy a few seconds later? Round to nearest whole number (if necessary) and include the appropriate unit.

PLEASE COMPLETE ACTIVITY 9.1 IN YOUR WORKBOOK.
IT IS DUE BY THE END OF TERM 2
THIS SECTION WILL BE INCLUDED IN YOUR MIDYEAR EXAM.

Required

0

I acknowledge that I have seen this instruction to finish Activity 9.1 in my own time, due by end of Term 2

Match the following scenarios with the most appropriate form of energy: 

light bulb

chemical potential energy

electrical cables

electrical energy

cyclist

potential energy

petrol

gravitational potential energy

stretched bow

kinetic energy

nuclear power station

radiant energy

sun

nuclear energy

brick raised above the ground

light energy

What is the gravitational potential energy of the rock when it is on the ground?

What is the gravitational potential energy of the rock when it is at its maximum height?

What is the kinetic energy of the rock when it is at its maximum height?

What is the total mechanical energy of the rock when it is at its maximum height?

2,42 J

11,71 J

114,79 J

What is the mathematical relationship between kinetic energy and mass?

This relationship means that if the mass of the object is doubled, the kinetic energy of the object will .....

What is the mathematical relationship between kinetic energy and velocity?

This relationship means that if the speed of the object is doubled, the kinetic energy of the object will .....

Match the following values of EK and EP for the cat as it falls towards the ground.

Draggable item		Corresponding Item
EK = 20 000 J		EP = 20 000 J
EK = 2 000 J		EP = 18 000 J
EK = 0 J		EP = 8 000 J
EK = 12 000 J		EP = 0 J

Assume the cat has a mass of 4 kg. What is the speed of the cat (in m.s-1) when it hits the ground? Round to nearest whole number (if necessary). No units.

Look at the clip showing a pendulum swinging. What is at a maximum value when the pendulum is in this position (20)?

Use the law of conservation of mechanical energy to perform the following calculations. 

and if the object is dropped 

Take gravitational acceleration to be 9,8 m.s-2.

A 1,5 kg rock has 50 J of gravitational potential energy when dropped. What is its kinetic energy when it hits the ground? Round to nearest whole number and include the appropriate unit.

A 1,5 kg rock is dropped from a height of 10 meters. What is its kinetic energy when it hits the ground? Round to nearest whole number (if necessary) and include the appropriate unit.

A 1,5 kg rock is falling. When it is 35 m above the ground, its speed is 6 m.s-1. How much kinetic energy does it have at the moment it hits the ground? Round to nearest whole number (if necessary) and include the appropriate unit.

A 1,5 kg rock is dropped from a height of 46 meters. What is its speed (in m.s-1) when it hits the ground? Round your answer to the nearest whole number (if necessary. No units.

A 1,5 kg rock is falling. When it is 35 m above the ground, its speed is 6 m.s-1. What is its speed when it hits the ground? Round your answer to the nearest whole number (if necessary). No units.

A 1,5 kg rock is falling. When it is 35 m above the ground, its speed is 6 m.s-1. What is its speed when it is 5 meters off the ground? Round your answer to the nearest whole number (if necessary). No units.

How much potential energy does a 1,5 kg rock have when dropped, if it has a speed of 26 m.s-1 when it is 5 meters above the ground? Round to nearest whole number (if necessary) and include the appropriate unit.

How much mechanical energy does a 1, 5 kg rock which is dropped have, if it has 20 J of kinetic energy and 15 J of potential energy a few seconds later? Round to nearest whole number (if necessary) and include the appropriate unit.

mass is inversely proportional to EK

EK is inversely proportional to mass

EK is directly proportional to mass squared

mass is directly proportional to EK

remain unchanged

also be doubled 

increase by a factor of 4 x

 
EK is directly proportional to velocity

EK is inversely proportional to velocity

EK is inversely proportional to velocity squared

velocity is inversely proportional to EK

also be doubled 

remain unchanged

decrease by a factor of 4 x (i.e. its a quarter of what it was originally)

EP = 18 000 J

EK = 0 J

EP = 8 000 J

EK = 12 000 J

EP = 0 J

E-Day Alternative Project: Energy

E-Day Alternative Project: Energy

What type of energy makes up the mechanical energy of an object when it is moving along the ground?

What type of energy makes up the mechanical energy of an object when it is positioned above the ground and not moving?

What type of energy makes up the mechanical energy of an object when it is positioned above the ground and moving?

EP = mgh

What is the kinetic energy of the plane?

Watch what happens to an object's mechanical energy when it is dropped (assuming a closed system, i.e. without friction).Does the following increase, decrease, or stay the same in an ideal situation as it falls to the ground?

If the system is not closed, what most likely would the energy be lost as?

What is the mass of the cat? Round your answer to the nearest whole number and use the correct units.

Look at the clip showing a pendulum swinging. What energy is at a maximum value when the pendulum is in this position (19)?

I acknowledge that I have seen this instruction to finish Activity 9.1 in my own time, due by end of Term 2

Match the following scenarios with the most appropriate form of energy:

What type of energy makes up the mechanical energy of an object when it is moving along the ground?

What type of energy makes up the mechanical energy of an object when it is positioned above the ground and not moving?

What type of energy makes up the mechanical energy of an object when it is positioned above the ground and moving?

EP = mgh

What is the gravitational potential energy of the rock when it is on the ground?

What is the gravitational potential energy of the rock when it is at its maximum height?

What is the kinetic energy of the rock when it is at its maximum height?

What is the total mechanical energy of the rock when it is at its maximum height?

What is the kinetic energy of the plane?

What is the mathematical relationship between kinetic energy and mass?

This relationship means that if the mass of the object is doubled, the kinetic energy of the object will .....

What is the mathematical relationship between kinetic energy and velocity?

This relationship means that if the speed of the object is doubled, the kinetic energy of the object will .....

Watch what happens to an object's mechanical energy when it is dropped (assuming a closed system, i.e. without friction).Does the following increase, decrease, or stay the same in an ideal situation as it falls to the ground?

If the system is not closed, what most likely would the energy be lost as?

What is the mass of the cat? Round your answer to the nearest whole number and use the correct units.

Match the following values of EK and EP for the cat as it falls towards the ground.

Assume the cat has a mass of 4 kg. What is the speed of the cat (in m.s-1) when it hits the ground? Round to nearest whole number (if necessary). No units.

Look at the clip showing a pendulum swinging. What energy is at a maximum value when the pendulum is in this position (19)?

Look at the clip showing a pendulum swinging. What is at a maximum value when the pendulum is in this position (20)?

A 1,5 kg rock has 50 J of gravitational potential energy when dropped. What is its kinetic energy when it hits the ground? Round to nearest whole number and include the appropriate unit.

A 1,5 kg rock is dropped from a height of 10 meters. What is its kinetic energy when it hits the ground? Round to nearest whole number (if necessary) and include the appropriate unit.

A 1,5 kg rock is falling. When it is 35 m above the ground, its speed is 6 m.s-1. How much kinetic energy does it have at the moment it hits the ground? Round to nearest whole number (if necessary) and include the appropriate unit.

A 1,5 kg rock is dropped from a height of 46 meters. What is its speed (in m.s-1) when it hits the ground? Round your answer to the nearest whole number (if necessary. No units.

A 1,5 kg rock is falling. When it is 35 m above the ground, its speed is 6 m.s-1. What is its speed when it hits the ground? Round your answer to the nearest whole number (if necessary). No units.

A 1,5 kg rock is falling. When it is 35 m above the ground, its speed is 6 m.s-1. What is its speed when it is 5 meters off the ground? Round your answer to the nearest whole number (if necessary). No units.

How much potential energy does a 1,5 kg rock have when dropped, if it has a speed of 26 m.s-1 when it is 5 meters above the ground? Round to nearest whole number (if necessary) and include the appropriate unit.

How much mechanical energy does a 1, 5 kg rock which is dropped have, if it has 20 J of kinetic energy and 15 J of potential energy a few seconds later? Round to nearest whole number (if necessary) and include the appropriate unit.

I acknowledge that I have seen this instruction to finish Activity 9.1 in my own time, due by end of Term 2

What is the gravitational potential energy of the rock when it is on the ground?

What is the gravitational potential energy of the rock when it is at its maximum height?

What is the kinetic energy of the rock when it is at its maximum height?

What is the total mechanical energy of the rock when it is at its maximum height?

What is the mathematical relationship between kinetic energy and mass?

This relationship means that if the mass of the object is doubled, the kinetic energy of the object will .....

What is the mathematical relationship between kinetic energy and velocity?

This relationship means that if the speed of the object is doubled, the kinetic energy of the object will .....

Match the following values of EK and EP for the cat as it falls towards the ground.

Look at the clip showing a pendulum swinging. What is at a maximum value when the pendulum is in this position (20)?

A 1,5 kg rock has 50 J of gravitational potential energy when dropped. What is its kinetic energy when it hits the ground? Round to nearest whole number and include the appropriate unit.

A 1,5 kg rock is dropped from a height of 10 meters. What is its kinetic energy when it hits the ground? Round to nearest whole number (if necessary) and include the appropriate unit.

A 1,5 kg rock is falling. When it is 35 m above the ground, its speed is 6 m.s-1. How much kinetic energy does it have at the moment it hits the ground? Round to nearest whole number (if necessary) and include the appropriate unit.

A 1,5 kg rock is dropped from a height of 46 meters. What is its speed (in m.s-1) when it hits the ground? Round your answer to the nearest whole number (if necessary. No units.

A 1,5 kg rock is falling. When it is 35 m above the ground, its speed is 6 m.s-1. What is its speed when it hits the ground? Round your answer to the nearest whole number (if necessary). No units.

A 1,5 kg rock is falling. When it is 35 m above the ground, its speed is 6 m.s-1. What is its speed when it is 5 meters off the ground? Round your answer to the nearest whole number (if necessary). No units.

How much potential energy does a 1,5 kg rock have when dropped, if it has a speed of 26 m.s-1 when it is 5 meters above the ground? Round to nearest whole number (if necessary) and include the appropriate unit.

How much mechanical energy does a 1, 5 kg rock which is dropped have, if it has 20 J of kinetic energy and 15 J of potential energy a few seconds later? Round to nearest whole number (if necessary) and include the appropriate unit.

Watch what happens to an object's mechanical energy when it is dropped (assuming a closed system, i.e. without friction).
Does the following increase, decrease, or stay the same in an ideal situation as it falls to the ground?

Watch what happens to an object's mechanical energy when it is dropped (assuming a closed system, i.e. without friction).
Does the following increase, decrease, or stay the same in an ideal situation as it falls to the ground?