Applied Mechanics and Graphic Statics
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

1.0
0.25
0.75
0.50

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Applied Mechanics and Graphic Statics
Free body diagram is an

Isolated joint with only body forces acting on it
Isolated joint with internal forces acting on it
Isolated joint with all the forces, internal as well as external, acting on it
None of these

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Applied Mechanics and Graphic Statics
Periodic time of body moving with simple harmonic motion, is

Inversely proportional to the square of its angular velocity
Directly proportional to the square of its angular velocity
Directly proportional to its angular velocity
Inversely proportional to its angular velocity

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