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A man weighing 80 kg is standing in a trolley weighing 320 kg. The trolley is resting on frictionless horizontal rails. If the man starts walking on trolley with a speed of 1m/s, then after 4 seconds his displacement relative to the ground will be A. 5 mB. 4.8 mC. 3.2 m D. 3.0 m |
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Answer» Correct Answer is (C) Explanation: Let Vmg = velocity of man with respect to ground ⇒ Vmg(M + M') - VmtM' ⇒ Vmg = 320/400 = 0.8 m/s |
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