A bullet loses 1/20 th of its velocity on passing through a plank. Assuming the planks exert a constant retarding force, what is the no. of such planks required to just stop the bullet? Options given, but I'd rather someone s ...
A simple pendulum consists of a bob of mass 'm' attached to a string of breaking strength double the weight of the bob. The bob is released from rest vertically when the string is horizontal. The string breaks when it makes a ...
