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 the trolley with a speed of 1 m s - 1 , then after 4 s , his displacement relative to the ground will be

Question

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 the trolley with a speed of 1 m s - 1 , then after 4 s , his displacement relative to the ground will be, 5 m, 4 . 8 m, 3.2 m, 3 m

MARKS App · Accepted Answer

Displacement of trolley w.r.t. ground, x = m L m + M = 80 × 4 80 + 320 = 0.8 m ∴ m 1 x 1 = m 2 x 2 ⇒ 320 × 0.8 = 80 x 2 ⇒ x 2 = 3.2 m

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