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NEET 2016

Exam: NEET
Year: 2016
Subject: Physics
Chapter: Center of Mass, Momentum and Collision

NEET 2016 · Physics · Center of Mass, Momentum and Collision

Two identical balls A and B having velocities of 0 . 5m s ^ - 1 and...

Two identical balls

A

and

B

having velocities of

0 . 5m{s}^{- 1}

and

- 0 . 3m{s}^{- 1}

, respectively, collide elastically in one dimension. The velocities of

B

and

A

after the collision, respectively, will be

Options

A $- 0 . 5m{s}^{- 1}$ and $0 . 3m{s}^{- 1}$
B $0 . 5m{s}^{- 1}$ and $- 0 . 3m{s}^{- 1}$
C $- 0 . 3m{s}^{- 1}$ and $0 . 5m{s}^{- 1}$
D $0 . 3m{s}^{- 1}$ and $0 . 5m{s}^{- 1}$

Correct answer

B. $0 . 5m{s}^{- 1}$ and $- 0 . 3m{s}^{- 1}$

Step-by-step solution

They will exchange their velocities, so,

${v}_{B} = 0 . 5m{s}^{- 1}$ and ${v}_{A} = - 0 . 3m{s}^{- 1}$ .

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