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A bullet moving at 20m/sec strikes a wooden plank and penetrates 4cm before coming to stop.The time taken to stop is?Question
A bullet moving at 20 m/sec strikes a wooden plank and penetrates 4cm before coming to stop the time taken to stop is
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Scott
the average speed while stopping is
... (20 + 0) / 2 = 10 m/s
t = d / r = 4 cm / 10 m/s = .004 s
... (20 + 0) / 2 = 10 m/s
t = d / r = 4 cm / 10 m/s = .004 s