IS2 Unit 3 Test: Work, Energy, & Power

Last updated almost 4 years ago

15 questions

Instructions

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S.6.B.8.a

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Library

IS2 Unit 3 Test: Work, Energy, & Power

Last updated almost 4 years ago

15 questions

Instructions

Use the equations on the board to answer the following questions. 

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4

Draggable item		Corresponding Item

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4

S.6.B.8.a

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2

Use the equations on the board to answer the following questions. 

Work is performed when

an object is moved 

a force pushes an object a certain distance

a balanced force allows an object to remain stationary

a force acts on a specific area

Match the following vocabulary words to their definition.

Draggable item		Corresponding Item
Kinetic energy		the ability to do work
Gravitational potential energy		energy that an object has due to its motion
Energy		the law that states that energy cannot be created or destroyed but can be changed from one form to another
Law of conservation of energy		the potential energy of an object due to its height, or its position relative to the earth's surface

It took a 36,000 N force to make a car move 1,500 meters. How many Joules of work is performed to make the car move?

24 J

34,500 J

5,400,000 J

An elevator lifts a load of passengers with a force of 156,000 N and does 2,550,000 J of work. How many meters did the elevator transport passengers?

16.35 m

20.55 m

3.98 x 1011 m

Order the following from most kinetic energy to least.

1,900 kg car traveling at 10 meters/second
181 kg motorcycle traveling at 10 meters/second
6,300 kg elephant traveling at 10 meters/second

A dog runs through the school at 5.6 m/s and has a mass of 40 kg. what is the dog's kinetic energy?

112 J

627.2 J

1,254.4 J

Quarter Horses are typically faster than Thoroughbreds over short distances. A racehorse can run at 18 m/s and has 195,000 J of kinetic energy. What is this racehorse's mass?

162 kg

1,200 kg

1,203.7 kg

How much potential energy does a squirrel up in a tree have? The squirrel has a mass of approximately 3 kg and is 14 meters high.

4.67 J

42 J

411.6 J

A city sets up a hydroelectric dam and they need about 25,000,000 J of energy produced every second. What is the mass of water that is necessary to create that kind of potential energy, if the dam is 42 meters high?

60,738.58 kg

2,500,000 kg

595,238.10 kg

Categorize the examples below as either potential energy or kinetic energy.

An apple hanging from a tree
A boulder rolling down a hill
A baseball player swinging a bat
A book sitting on a shelf
A boulder sitting at the top of a hill
A jack in the box before it's released
A roller coaster moving at the bottom of a hill
A soccer ball moving across the field after it's been kicked

Potential Energy
Kinetic Energy

At what point does the object have the most potential energy?

At what point does the object have the most kinetic energy?

As Bob jumps off the couch, his potential energy equals 50 J. What is his kinetic energy if his total mechanical energy is still 150 J?

0 J

50 J

100 J

200 J

If the power rating of a incandescent light bulb is 60 Watts, then how much time does it take the light bulb to run to acheive 120 J of work?

0.5 seconds

2 seconds

4 seconds

Someone wearing skates on a horizontal surface is pushed by a friend with a force of 65 N. How far must the student be pushed in 30 seconds, so that her power is 352 W?

0.18 m

5.54 m

162.46 m

Work is performed when 

an object is moved 

a force pushes an object a certain distance

a balanced force allows an object to remain stationary

a force acts on a specific area

Match the following vocabulary words to their definition.

Kinetic energy

the ability to do work 

Gravitational potential energy

energy that an object has due to its motion

Energy

the law that states that energy cannot be created or destroyed but can be changed from one form to another

Law of conservation of energy

the potential energy of an object due to its height, or its position relative to the earth's surface

It took a 36,000 N force to make a car move 1,500 meters. How many Joules of work is performed to make the car move?

24 J

34,500 J

5,400,000 J

An elevator lifts a load of passengers with a force of 156,000 N and does 2,550,000 J of work. How many meters did the elevator transport passengers?

16.35 m

20.55 m

3.98 x 1011 m

Order the following from most kinetic energy to least. 

1,900 kg car traveling at 10 meters/second

181 kg motorcycle traveling at 10 meters/second

6,300 kg elephant traveling at 10 meters/second

A dog runs through the school at 5.6 m/s and has a mass of 40 kg. what is the dog's kinetic energy?

112 J

627.2 J

1,254.4 J

Quarter Horses are typically faster than Thoroughbreds over short distances. A racehorse can run at 18 m/s and has 195,000 J of kinetic energy. What is this racehorse's mass?

162 kg

1,200 kg

1,203.7 kg

How much potential energy does a squirrel up in a tree have? The squirrel has a mass of approximately 3 kg and is 14 meters high.

4.67 J

42 J

411.6 J

A city sets up a hydroelectric dam and they need about 25,000,000 J of energy produced every second. What is the mass of water that is necessary to create that kind of potential energy, if the dam is 42 meters high?

60,738.58 kg

2,500,000 kg

595,238.10 kg

Categorize the examples below as either potential energy or kinetic energy.

An apple hanging from a tree

A boulder rolling down a hill

A baseball player swinging a bat

A book sitting on a shelf

A boulder sitting at the top of a hill

A jack in the box before it's released

A roller coaster moving at the bottom of a hill

A soccer ball moving across the field after it's been kicked

Potential Energy

Kinetic Energy

At what point does the object have the most potential energy?

A

B

C

D

E

At what point does the object have the most kinetic energy?

A

B

C

D

E

As Bob jumps off the couch, his potential energy equals 50 J. What is his kinetic energy if his total mechanical energy is still 150 J?

0 J

50 J

100 J

200 J

If the power rating of a incandescent light bulb is 60 Watts, then how much time does it take the light bulb to run to acheive 120 J of work?

0.5 seconds

2 seconds

4 seconds

Someone wearing skates on a horizontal surface is pushed by a friend with a force of 65 N. How far must the student be pushed in 30 seconds, so that her power is 352 W?

0.18 m

5.54 m

162.46 m