Lakhmir Singh Solutions Class 9 Physics Solutions for Exercise in Chapter 2 - Force and Laws of Motion
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A 10g bullet travelling at 200 m/s strikes and remains embedded in a 2kg target which is originally at rest but free to move. At what speed does the target move off?
Answer:
Mass of bullet, m1 = 10g = 0.01 kg
Velocity of bullet, v1 = 200 m/s
Mass of block with an embedded bullet, m2 = 2 + 0.01 = 2.01kg
Recoil velocity, v2 = ?
m1v1 = m2v2
v2 = 0.99 m/s
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