1. An object\'s gravitational potential energy can be positive or negative, but

Question

1. An object's gravitational potential energy can be positive or negative, but not zero. True/False?

2. If two objects with the same mass both have 100 J of mechanical energy, it's nonetheless possible for them to be moving at different speeds. True/False?

3. Gravity is a non-conservative force. True/False?

4. If an object's mechanical energy is conserved during a given interval, it's still possible for the object's KE and PE to change during that interval. True/False?

5. Power can be defined as the total amount of work done on an object by a force. True/False?

6. Impulse is a vector, but momentum is a scalar. True/False?

7. When colliding objects don't stick together, their collision is termed elastic. True/False?

Explanation / Answer

1. False

2. False, KE = 1.2 mv^2 so same KE and same m means same v

3. False Gravity is conservative

4. yes they can change just the sum of them stays the same

5. FAlse, Power = Work/time

6. FAlse both are vectors

7. FAlse,

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