A plank with a uniform sphere placed on it rests on a smooth hori… - Vidyadip

MCQ

$A$ plank with a uniform sphere placed on it rests on a smooth horizontal plane. Plank is pulled to right by $a$ constant force $F$. If sphere does not slip over the plank. Which of the following is incorrect.

A
Acceleration of the centre of sphere is less than that of the plank.
B
Work done by friction acting on the sphere is equal to its total kinetic energy.
C
Total kinetic energy of the system is equal to work done by the force $F$
✓
None of the above

✓

Answer

Correct option: D.

None of the above

d

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