i. Potential energy is the energy of position. A) True B) False e work-energy th

Question

i. Potential energy is the energy of position. A) True B) False e work-energy theorem, the work done by friction on an object is always positive B) False 2. According to the A) True 3. When only the force o r gravity does work, the total mechanical energy is conserved. A) TrueB) False 4. The magnitude of the work done by a force can be expressed as w = Af.E. A) TrueB) False 5. If the vector sum of the external forces on a system is zero, the total momentum of the system is constant A) True B) False 6. Centripetal and Tangential accelerations are the same thing. A) True B) False collision is elastic. A) True B) False 7. If the total momentum of a system is conserved in a collision, but the total kinetic energy is not, then the 8. If the rotational kinetic energy of a rigid body doubles, the angular velocity will increase by a factor of 1. A) True B) False

Explanation / Answer

1) True

2) False(because work done by friction on an object is always negative.)

3)True

4)False

5)True

6)False

7) false

8)True

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