Questions
A ball is projected horizontally with a velocity of 5 m/s from the top of a building 19.6 m high. How long will the ball take to hit the ground ?
detailed solution
Correct option is B
Let t s be time taken by the ball to hit the ground. ∵H=12gt2∴t=2Hg=2×19.6m9.8ms−2=2s.Similar Questions
A body of mass 1 kg is moving along positive x-axis with velocity 2 m/s. At t = 0, a constant force, parallel to positive y-axis, starts acting on the body and after 5 sec, speed of the body is found to be 4 m/s. Then work done by the force in 5 sec is
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