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- 1. Multiple ChoiceHow do you calculate power?P = W/tP = E/tP = w * tP = bbq/chicken
- 2. Multiple ChoiceHow do we calculate work?W = F * dw = f * DW = F * Dw = f * d
- 3. Multiple ChoiceThe SI unit of work is?JoulesWattsNewtonsmeters
- 4. Multiple Choice
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
- 5. Multiple ChoiceWhat is the power of a kitchen blender if it can perform 3,750 joules of work in 15 seconds?56, 250 watts250 watts
- 6. Multiple Choice
Work is equal to the change in _______
Kinetic Energy
Potential Energy
Total Mechanical Energy
Power
- 7. Multiple Choice
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
- 8. Multiple Choice
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
- 9. Multiple Choice
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
- 10. Multiple Choice
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
- 11. Multiple Choice
The equation for spring force is
Fsp = mgh
Fsp = 1/2kx2
Fsp = Fd
Fsp = -kx
- 12. Multiple Choice
The equation for spring potential energy is
PEg = mgh
PEg= 1/2kx2
PEg= Fd
PEg = 1/2mv2
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