The ram of a pile driver drops onto the top of an Iron beam, driving it partway

Question

The ram of a pile driver drops onto the top of an Iron beam, driving it partway into the ground. The distance that the beam sinks into the ground depends on the A. initial height of the ram. B. initial potential energy of the ram. C. kinetic energy of the ram when it first hits the beam. D. all of the above. A feather and a coin dropped in a vacuum fall with equal A. forces due to gravity. B. accelerations. C. kinetic energies. D. potential energies. A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is negligible the melon will return to its initial level with a kinetic energy of less than 100 J. more than 100 J. 100 J.

Explanation / Answer

14. This question is not visible.

15. As the acceleration of both objects will be equal to acceleration due to gravity. So acceleration of both objects will be same. So option B is correct.

16. As gravitational force is conservative so kinetic energy of the object at initial position will be 100J. So option C is correct.

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