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# GATE 2022 ME: Engineering Mechanics Quiz - 5

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Question 1

In case of a nuclear reactor, the neutrons moving in random directions in reactor collide with each other. If the another particle is at rest, determine the velocity of the particle that struck after collision. Take u1 = 2.2 km/hr, mass of neutron = 1.6726 x 10-27 kg

Question 2

If a ball which is dropped from a height of 2.25 m on a smooth floor attains the height of bounce equal to 1.00 m, the coefficient of the restitution between the ball and the floor is equal to:

Question 3

From a point, on a smooth floor, a toy ball is shot to hit a wall. The ball then returns back to the point of projection. Find the coefficient of restitution between the ball and the wall if the time taken by the ball in returning is thrice the time taken in reaching the wall

Question 4

A boy drops a ball from a height of 9 m on a concrete ground. The ball then bounces from the ground vertically upwards. The coefficient of restitution is 0.8 What will be the velocity of the ball when it reach’s a height of 2m. ________

Question 5

A contraption was to be made for a technical event. In which a ball bearing 500 g starts from a rest and it is to strike another ball bearing 50 cm below it. The ball bearing slides down a tube twice its diameter and is assumed to be frictionless. Find the velocity with which it will strike the ball. Take e = 0.6

Question 6

A ball is thrown vertically downwards with velocity from a height h. After colliding with the ground, it just reaches the starting point. Coefficient of restitution is
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