 # Civil Engineering Objective Questions { Applied Mechanics }

127. The phenomenon of collision of two elastic bodies takes place because bodies

128. The total time of collision and restitution of two bodies,is called

129. Newton's law of Collision of elastic bodies states that when two moving bodies collide each other, their velocity of separation

130. For perfectly elastic bodies, the value of coefficient of restitution is

131. A ball of mass 1 kg moving with a velocity of 2 m/sec collides a stationary ball of mass 2 kg and comes to rest after impact. The velocity of the second ball after impact will be

132. The masses of two balls are in the ratio of 2: 1 and their respective velocities are in the ratio of 1 : 2 but in opposite direction before impact. If the coefficient of restitution is 12, the velocities of separation of the balls will be equal to

133. A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is

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