JEE Main Physics question
A body of mass 50 kg is projected vertically upwards with a velocity of 100 m/sec. 5 seconds after this, the body breaks into 20 kg and 30 kg pieces. If the 20 kg piece travels upwards with 150 m/sec, then the velocity of the other block will be [RPMT 1999]
Answer: (A)
Solution
Velocity of the 50 kg body just before breaking up, v = u − gt = 100 − 9.8(5) = 51 m/s (upward). At this instant, = 50 ×
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