A train is moving on a track at 30ms−1. A ball is thrown with a speed of 30ms−1 at 45∘ with horizontal. Find the distance in the plane of motion of the train, of the ball from the point of projection on the train to the point where it strikes the ground.
90m
60m
60√3m
90√3m
A
60√3m
B
90m
C
90√3m
D
60m
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Solution
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The horizontal range R=u2sin2θg=(30)2sin9010=90 m (As we measure the distance with respect to the frame of train so velocity of train will not effect on the distance )
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