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12 questions
Energy can be transformed from one form into another, but the total amount of energy never changes.
Work-energy theorem
Law of conservation of energy
Newton's second law of motion
King's theorem of energy
Work is equal to the change in _______
Kinetic Energy
Potential Energy
Total Mechanical Energy
Power
A runner begins at a speed of 2 m/s. By the middle of the race, the runner is at a speed of 6 m/s. The runner has a mass of 60 kg. How much work was done?
1200 J
1200 N
960 J
960 N
A 70 kg gymnast somersaults onto a mat at a speed of 10 m/s. When she is finished with the flip, she is moving at 4 m/s. How much work was done during the flip?
2,940 J
-2,940 J
2,940 N
-2,940 N
How much work does it take to get a 300 kg roller coaster car to go from 0 m/s to 70 m/s?
73,500 J
73,500 N
0 J
0 N
A spring with spring constant 16 N/m is compressed by 0.5 m. How much energy is stored in the spring?
1 J
0.25 J
2 J
16 J
The equation for spring force is
F_{sp} = mgh
F_{sp }= 1/2kx^{2}
F_{sp }= Fd
F_{sp} = -kx
The equation for spring potential energy is
PE_{g} = mgh
PE_{g}= 1/2kx^{2}
PE_{g}= Fd
PE_{g} = 1/2mv^{2}
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