## Applied Mechanics and Graphic Statics 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 ½, the velocities of separation of the balls will be equal to

Original velocity in the same direction
Original velocity in the opposite direction
Half the original velocity in the same direction
Half the original velocity in the opposite direction

## Applied Mechanics and Graphic Statics A cube on a smooth horizontal surface

Can be in any of these states
Cannot be in unstable equilibrium
Cannot be in stable equilibrium
Cannot be in neutral equilibrium

## Applied Mechanics and Graphic Statics Pick up the correct statement from the following. The kinetic energy of a body

Before impact is more than that after impact
Before impact is less than that after impact
Before impact is equal to that after impact
Remain constant

## Applied Mechanics and Graphic Statics ‘u₁’ and ‘u₂’ are the velocities of approach of two moving bodies in the same direction and their corresponding velocities of separation are ‘v₁’ and ‘v₂’. As per Newton's law of collision of elastic bodies, the coefficient of restitution (e) is given by

e = v₁ - v₂/u₂ + u₁
e = v₁ - v₂/u₂ - u₁
e = v₂ - v₁/u₁ - u₂
e = u₂ - u₁/v₁ - v₂

3
4
43833
43834

## Applied Mechanics and Graphic Statics A projectile is thrown at an angle ‘α’ to the horizontal with velocity ‘v’. It will have the maximum centripetal acceleration

Elsewhere
At the start
As it strikes the ground
At the top of the trajectory