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Consider a gravity free hall in which an...

Consider a gravity free hall in which an experimenter of mass 50 kg is resting on a 5 kg pillow, 8 ft above the floor of the hall. He pushes the pillow down so that it starts falling at a speed of 8 ft/s. The pillow makes a perfectly elastic collision with the floor, rebounds and reaches the experimenter\'s head. Find the time elapsed in the process.

A

2.2 s

B

1.1 s

C

4.4 s

D

3.3 s

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The correct Answer is:
A
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Consider a gravity free hall in which an experimetner of mass 50 kg is resting on a 5 kg pilow, 8 ft above the floor of the hall. He pushes the pilow down so that it starts falling at a pseed of 8 fft/s. The pillow makes a perfectly elastic collision with teh floor, rebounds and reaches the experimeter's head. Findthe time elapsed in the process.

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Knowledge Check

  • A man of 50 kg mass is standing in a gravity free space at a height of 10m above the floor. He throws a stone of 0.5 kg mass downwards with a speed 2m//s . When the stone reaches the floor, the distance of the man above the floor will be

    A
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    C
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    D
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  • A pan of mass m = 1.5 kg and a block of mass M = 3 kg are connected to each other by a light inextensible string, passing over a light pulley as shown in Fig. Initially, the block is resting on a horizontal floor. A ball of mass m_0 = 0.5 kg collides with the pan at a speed v_0= 20 m//s . Consider this instant of collision as t = 0 . Assume collision to be perfectly inelastic. Now, Fig. answer the following questions based on the above information. Find the time t at which the block strikes the floor for the first time

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  • A pan of mass m = 1.5 kg and a block of mass M = 3 kg are connected to each other by a light inextensible string, passing over a light pulley as shown in Fig. Initially, the block is resting on a horizontal floor. A ball of mass m_0 = 0.5 kg collides with the pan at a speed v_0= 20 m//s . Consider this instant of collision as t = 0 . Assume collision to be perfectly inelastic. Now, Fig. answer the following questions based on the above information. . Find the maximum height reached by the block alter the second jerk.

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