Question

A block is moving under the influence of a constant force $F=3600\text{N}$. The force acts on the ball for the duration of $0.004\text{h}$. The average impulse imparted by the force is

• A. $14400\text{N s}$
• B. $51840\text{N s}$
• C. $0.004\text{N s}$
• D. $2844\text{N s}$

Answer 1

The correct option is B $51840\text{N s}$

Average impulse imparted by the force $=F.\Delta t$
i.e $J=F.\Delta t$
Given, $F=3600\text{N}$
$\Delta t=0.004\text{h}=3600\times 0.004\text{s}$
$\Delta t=14.4\text{s}$
Therefore,
$J=F.\Delta t$
$=3600\times 14.4$
$=51840\text{N s}$