Question
Question: A sphere S rolls without slipping, moving with a constant speed on a plank P. The friction between t...
A sphere S rolls without slipping, moving with a constant speed on a plank P. The friction between the upper surface of P and the sphere is sufficient to prevent slipping, while the lower surface of P is smooth and rests on the ground. Initially, P is fixed to the ground by a pin N. If N is suddenly removed,
A
S will begin to slip on P.
B
P will begin to move backwards.
C
The speed of S will decrease and its angular velocity will increase.
D
There will be no change in the motion of S and P will still be at rest.
Answer
There will be no change in the motion of S and P will still be at rest.
Explanation
Solution
In rolling without slipping, at constant speed, there is no force of friction between the surfaces.
Therefore, removing the pin causes no change to the system.