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 retardation

• A. $2m{s}^{-2}$
• B. $0.2m{s}^{-2}$
• C. $200cm{s}^{-2}$
• D. $200m{s}^{-2}$

Answer 1

Answer: (D)

$200m{s}^{-2}$

Given that force is 10 N and mass as 50g which is also equal to $50/1000=1/20$. We know that force is equal to $F=m\times a$
$10=a\times 1/20$
$a=20\times 10=200m/s^2$.
Hence retardation is $200m/s^2$.