Q.

A body is projected horizontally from the top of a tower with initial velocity 18 ms-1. It hits the ground at angle 45°. What is the vertical component of velocity when strikes the ground? 

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a

9 ms-1

b

92ms-1

c

 18 ms-1

d

182 ms-1

answer is C.

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Detailed Solution

vcos45°=u=18 ms-1   v=182 ms-1 Vertical component  

Question Image

ysin45°=182×12=18 ms-1

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