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Energy CP

Last updated over 1 year ago

10 questions

Instructions

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Question 1

1.

A high diver steps off a diving platform that is 10 meters above the water. If no air resistance is present, during the fall there will be a decrease in the diver's

gravitational potential energy

total mechanical energy

kinetic energy

momentum

Question 2

2.

Which of the following is a best example of work being done on an object?

lifting a 50 kg weight up off the ground

holding a bag of groceries

keeping a board in place

pushing a car that will not move

Question 3

3.

What is the kinetic energy of a 2 kg toy car that is moving with a velocity of 5 m/s

5 J

10 J

25 J

50 J

Question 4

4.

A hydraulic lift used at an automotive repair shop raises a 1000 kg car two meters off the ground. What is the potential energy given to the car.

1000 J

2000 J

9800 J

19,600 J

Question 5

5.

A rock climber weighs 550 N and is carrying a backpack that weights 50 N. How much total work has been done after she climbs 12 m.

50 J

600 J

6000 J

7200 J

Question 6

6.

Fireworks displays are common on the 4th of July. Energy changes occur during the flight of a firework. Which of the following represents a correct energy change?

When the firework rocket left the ground chemical energy changed into kinetic energy.

When the firework rocket exploded kinetic energy changed into chemical potential energy.

During the rise of the firework rocket gravitational potential energy changed into kinetic energy.

During the rise of the firework rocket gravitational potential energy changed into heat, light, and sound.

Question 7

7.

A skateboarder travels from location 1 to location 4 as shown below.
At which location does the skateboarder have the most kinetic energy and the least potential energy?

1

2

3

4

Question 8

8.

Three different boxes are lifted to different heights.
Box X weighs 115 N and is lifted tp 15 m.
Box Y weighs 210 N and is lifted to 10 m.
Boz Z weighs 305 N and is lifted to 5 m.

Which of the following statements best describes the boxes' change in mechanical energy?

Box X has the greatest change in mechanical energy.

Box Z has the smallest change in mechanical energy.

Boxes X and Y have the same change in mechanical energy.

Boxes Y and Z have the same change in mechanical energy

Question 9

9.

Windmills are used to covert wind energy into a more useful form. In most cases, there are three steps in this process. The energy is in a different form at each step. Which of the following flowcharts shows the most likely order of the energy change?

wind energy → mechanical energy  →  solar energy

wind energy → thermal energy → mechanical energy

wind energy → solar energy → electrical energy

wind energy → mechanical energy → electrical energy

Question 10

10.

The diagram shows two bowling balls of equal mass. Ball A is resting near the edge of a shelf. Ball B is resting on the ground below.

Which of the following statements best describes the diagram above?

Ball A has more kinetic energy than Ball B.

Ball B has more kinetic energy than Ball A.

Ball A has more potential energy than Ball B.

Ball B has more potential energy than Ball A.