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A ball of mass 1 kg is moving with a velocity of 15 m/sec undergoes a head onelastic collision with another ball of unknown mass at rest, and reboundswith a velocity of 10 m/sec. What is the mass of other ball ? |
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Answer» Mass of ball = 1 kg initial speed = 15m/s final speed = -10 m/s ( because it rebounds elastically) Change in momentum= mv - mu => ∆P = 01×(-10) - 1×15 =>∆P = -25 kg.m/s Given that contact time = 0.1s force = ∆P/t = -10/0.1 = -100 N |
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