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JEE Main 202228 JuneMorning Shift

Exam: JEE Main
Year: 2022
Date: 28 June
Shift: Morning Shift
Subject: Physics
Chapter: Center of Mass, Momentum and Collision

JEE Main 2022 · 28 June · Morning Shift · Physics · Center of Mass, Momentum and Collision

A man of 60kg is running on the road and suddenly jumps into a...

A man of

60kg

is running on the road and suddenly jumps into a stationary trolly car of mass

120kg

. Then the trolly car starts moving with velocity

2{ms}^{- 1}

. The velocity of the running man was _____

m{s}^{- 1}

, when he jumps into the car.

Correct answer

0

Step-by-step solution

Applying conservation of the momentum,

${m}_{m}u = \left({m}_{m} + {m}_{t}\right)v ⇒ 60u = \left(60 + 120\right) \times 2 ⇒ u = 6m{s}^{- 1}$

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