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>>Class 11
>>Physics
>>Laws of Motion
>>Newton's Second Law of Motion
>> $A body of mass 'm' and velocity 'u' stri$

Question

A body of mass 'm' and velocity 'u' strikes a wall and rebounds with velocity 'v'. The change in momentum is:

A

$m (v - u)$

B

$m (u - v)$

C

$- m (v + u)$

D

none of these

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Updated on : 2022-09-05

Solution

Verified by Toppr

Correct option is C)

Given : $u = u \overset{x}{^}$ $v = - v \overset{x}{^}$
Thus change in momentum $Δ P = m (v - u)$
$∴$ $Δ P = m (- v - u) = - m (u + v)$ $\overset{x}{^}$

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