Select which of the following statements are True or False. Assume Newtonian Mec

Question

Select which of the following statements are True or False. Assume Newtonian Mechanics.
1.  The acceleration of an object is same in all inertial reference frames.
2.  A particle's kinetic energy can change without having any net work done it.
3.  The power required to lift a mass does not depend on the speed at which the mass is raised.
4.  The work required to lift a mass one meter depends on the speed at which it is raised..
5.  A simple machine cannot reduce the work required to do a task.
6. The work done by a constant force acting on an object is equal to the magnitude of the force times the distance the object moves.

I've already tried:

1. T                 1. T         1.T

2. F                 2. F          2.F

3. F                 3. T          3.T

4. F                 4. F          4.F

5. F                 5.F           5.T

6. F                  6. F         6. T

Explanation / Answer

1.False- accel. is not same in all intertial frame.suppose u r on a accelarating train.then for ur frame of reference accelaration of train will be zero.

2.True-KE can be converted into PE energy dirctly. e.g. moving ball in upward direction.in this case KE is changing without any work done on it.

3.False-it depends.P=F.V

4.Fale- W=F.S distance matters but speed doesn't

5.True- it only reduces effort i.e. reduces only force

6. False - it is not simply product......it is dot product......force multiplied distance in the direction of force

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