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Ball A of m...

Question

Ball $A$ of mass $1 k g$ moving right with speed $2 m / s$ bounces off ball $B$ of mass $1.5 k g$ , and then moves left with speed $4 m / s$ .
Calculate magnitude of impulse (SI units) received by ball $B$ .

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Solution

Impulse is the change in momentum. So, the magnitude of impulse received by ball B will be,

$I = m_{A} Δ v$

$= 1 \times {2 - (- 4)}$

$= 6 k g m / s$

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