Question

A body of mass $50g$ is moving with a velocity of $10m{s}^{-1}$. It is brought to rest by a resistive force of $10N$. Find the distance that the body will travel after the resistance force is applied.

• A. $25km$
• B. $50m$
• C. $25cm$
• D. $50cm$

Answer 1

Answer: (C)

$25cm$

Given that force is 10 N and mass as 50 g which is also equal to $50/1000=1/20$. We know that force is equal to $F=m\times a$
$10=a\times 1/20$
$a=20\times 10=200m/s^2$.
$s=(v^2-u^2)/2a$
$s={10}^2/(2\times 200)=0.25m$
$s=25cm.$