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
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Question 2
2.
Which of the following is a best example of work being done on an object?
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Question 3
3.
What is the kinetic energy of a 2 kg toy car that is moving with a velocity of 5 m/s
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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.
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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.
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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?
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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?
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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?
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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?
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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?