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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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