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Question

A body is projected vertically down from the top of a tower of hieght h ( = 40 m) with a velocity v1=5m/s. Another body is projected up from the bottom of the tower with vertically ipwards velocity v2=15m/s. When will the bodies meet ?


A

2 second

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B

4 second

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C

6 second

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D

8 second

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Solution

The correct option is A

2 second


Apply 1D motion equation for the relative motion between the bodies.

Time taken to meet will be,

t = hV = 4020 = 2 second


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