His kinetic energy at point B will be ________ his kinetic energy at point A.
A) less than
B) more than
C) equal to
D) zero, equal to
Correct Answer: A
Solution :
The amount of kinetic energy an object has depends on its mass. Since sand is continuously falling out of the bag, the total mass of the man at point B is less than total mass at point A. Hence, his kinetic energy will be less at point B than at point A.
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