Question

A bullet moving at 20m/sec strikes a wooden plank and penetrates 4cm before coming to stop.The time taken to stop is?
ave. velocity = (20 + 0) / 2 = 10 m/s

.04 m / 10 m/s = .004 s

Related Questions

A bullet moving with a speed 150 m/s strikes a tree and penetrates 3.5 cm before stopping. Find the... A bullet having a mass of 10g and moving with a speed of 1.5m/s penetrates a thick wooden plank of m... A bullet m9ving at a speed of 10m/s strikes a wooden plank . The bullet penetrates the plank 2cm dee...