Question
Question: A small block is shot into each of the four tracks as shown below. Each of the track rises to the sa...
A small block is shot into each of the four tracks as shown below. Each of the track rises to the same height. The speed with which the block enters the track is the same in all cases. At the highest point of the track, the normal reaction is maximum in case of
A
B
C
D
Answer
Explanation
Solution
Here, speed of the block at the highest points in all the four cases will be same. The normal reactions at these points will depend upon the centripetal acceleration experienced by the block.
Centripetal acceleration = v2/R
Radius of curvature in the first case will be minimum, so centripetal acceleration and hence reaction will be maximum in this case.