JEE Main Physics question
At a high altitude, a body explodes at rest into two equal fragments with one fragment receiving a horizontal velocity of 10 m/s. Time taken by the two radius vectors (connecting the point of explosion to the fragments) to make 90° is
Answer: (C)
Solution
Since the body was at rest and explodes into two equal masses, conservation of momentum gives the other fragment a velocity of 10 m/s in the exactly opposite horizontal direction; both fall freely under gravity thereafter. The radius vectors from the explosion
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