Questions
Two tall buildings are 30 m apart. The speed with which a ball must be thrown horizonally from a window 150 m above the ground in one building so that it enters a window 27.5 m from the ground in the other building is
detailed solution
Correct option is B
h = 150 - 27.5 = 122.5 m∴t=2×122.59.8=5secHence, u=Rt=305=6ms−1Talk to our academic expert!
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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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