Q.
A body is projected horizontally from the top of a tower with initial velocity 18 m s-1. It hits the ground at angle 45o . What is the vertical component of velocity when strikes the ground?
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a
9ms−1
b
92ms−1
c
18ms−1
d
182ms−1
answer is C.
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Detailed Solution
vcos45∘=u=18ms−1⇒ v=182ms−1Vertical component vsin45∘=182×12=18ms−1
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