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Question

Particle is projected with speed 52 m/s at an angle of projection 45 from horizontal. At maximum height it breaks in two identical particle, velocity of one particle is zero, find time (in sec) when first part strikes the ground after explosion. Take g=10 m/s2

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Solution

H=(52)2sin2θ2g=50×120×2=5040=54m
T=2hg= 2×5410=14=0.5 sec

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