Question

A hockey player applies an average force of $60\text{N}$ to $250\text{g}$ hockey puck for a time of $100\text{ms}$. The impulse experienced by the hockey puck is

• A. $8\text{N-s}$
• B. $6\text{N-s}$
• C. $12\text{N-s}$
• D. $10\text{N-s}$

Answer 1

The correct option is B $6\text{N-s}$

Given:
Average force ;$F=60\text{N}\text{time}\left(t\right)=100\text{ms}=100\times {10}^{-3}\text{s}=0.1\text{s}$
We know,
Impulse $J=Ft$
$=60\times 0.1=6\text{N-s}$