177. A body X with a momentum p. collides with another identical stationary body Yone dimensionally. During the collision gives an impulse / to body x Then coefficient of restitution is 21-1 178. A pendulum consists of a wooden bob of mass mand of length/A bullet of mass m, as fired towards the pendulum with a speed, The bullet emerges out of the bob with a speed y/3 and the bob just completes motion along a vertical circle. Then v, 15! mmmmm 179. Two pendulums each of length / are initially situated as shown in figure. The first pendulum is released and strikes the second. Assume that the collision is completely inelastic and neglect the mass of the string and any frictional effects. How high does the centre of mass rise after the collision? tely inelastic and my O dd m2 180. A mass m moves with a velocity v and collides inelastically with another identical mass. After collision the 1st mass moves with velocity in a direction perpendicular to the initial direction of motion. Find the speed of the 2nd mass after collision. At rest before collision After collision (b) (d) √3v 181. A ball is projected vertically down with an initial velocity from a height of 20 m onto a horizontal floor. During the impact it loses 50% of its energy and rebounds to the same height. The initial velocity of its projection is