18 8)

b)

19

20 a)

b)

0000EST 10012 1903

masses. Consider the pulley as massless and coefficient of friction as 0.20.
Block A=200 kg and block B=100kg

A glass ball is dropped on to a smooth horizontal floor from which it bounces to
a height of 9m. On the second bounce, it rises to a height of 6m. From what
height the ball was dropped and what is the coefficient of restitution between the
glass and the floor?

Two cars A and B travelling in same direction get stopped at a traffic signal.
When signal turns green, car A accelerates at 0.75 m/s’ and 1.75 seconds later,
car B starts and accelerates at 1.1 m/s*. Determine i) when and where 8 will
overtake A and ii) the speed of each car at that time.
Module-V

A circular 6150 of radius r=30cm and weight W=145N is free to rotate about its
geometric axis. A flexible cord carrying a weight of Q= 45N, is wound around
the circumference of the disc as shown in Fig. If the weight Q is released from
rest, find (a) the time ¢ required for it to fall through the height h=300cm (b) with
what velocity v will it strike the floor?

A 5014 weight is suspended from a spring of constant k=8 N/cm. Neglecting the
mass of the spring, find the period for small amplitudes of vertical oscillations.

A particle performing Simple harmonic motion. When it is at distances of
10.0cm and 20.0cm from the mean position, its velocities are 1.2 m/s and 0.8 m/s
respectively. Find (a) amplitude of oscillations. (b) time period of oscillations

(c) its maximum velocity and (d) its maximum acceleration.
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