# Dynamics

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Multiple choice question

The coefficient if restitution is defined on basis of ________

a)Velocity compound along the line of impact only
b)Velocity compound normal to the line of impact
c)Velocity vectors before and after collision
d)Energies of bodies before and after the impact

• Dynamics -

c)Velocity vectors before and after collision

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The velocity of cylinder which is released from rest on θ degree incline after it has rolled through a distance l is given by ______.

• Dynamics -

multiple choice question
for a perfectly plastic central impact______
(A)the entire kinetic energy of two bodies must be lost
(B)the two bodies must move stuck together whether the impact is direct or indirect the two bodies must move stuck together only if the impact is direct

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