Question

A force of $10kgf$ is applied for $0.1s$ on a body of mass $100g$ initially at rest. Calculate the momentum acquired by the body.

• A. $10g$ $m{s}^{-1}$
• B. $10kg$ $cm{s}^{-1}$
• C. $100kg$ $m{s}^{-1}$
• D. $10kg$ $m{s}^{-1}$

Answer 1

The correct option is D $10kg$ $m{s}^{-1}$

Given a force of 10 kgf which is equal to 100 N after conversion.We know that force is nothing but rate of change of momentum.

$F=\Delta P/\Delta t$

$100=\Delta P/0.1$

$\Delta P=10kgm/sec$

Hence momentum is $10kgm/sec$.