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A body is projected horizontally with a ...

A body is projected horizontally with a speed of 20m/s from the top of a tower . What will be it's speed nearly after 5 sec ? Take g = 10`m//s^2`

A

54m/s

B

20m/s

C

50m/s

D

70m/s

Text Solution

Verified by Experts

The correct Answer is:
A
t = 5 second ,` v_x` = 20m/s ,` v_y` = gt = 50m/s
`sqrt(v^2x +v^2y) =sqrt(20^2+50^2)= sqrt2900 = 54m//s`
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