Dr. S K Jain and Dr. Shailesh K Jain Solutions for Chapter: Force and Laws of Motion, Exercise 2: CLASS ASSIGNMENT 2

Define the momentum of a body. What are the units of momentum?

How is the change in momentum related to the force?

Write the SI and non-SI units of force.

Why does a fielder pull his arms back while trying to stop/catch a cricket ball?

Calculate the force of gravity acting on a body of mass $1 \mathrm{kg}$. Take acceleration due to gravity, $\mathrm{g}=9.8 {\mathrm{ms}}^{-2}$.

Which would require greater force- acceleration of $10 \mathrm{g}$ mass at $5 {\mathrm{ms}}^{-2}$ or of $20 \mathrm{g}$ mass at $2 {\mathrm{ms}}^{-2}$.

Show that the Newton's first law of motion is contained in the second law of motion.

What is meant by the impulse of a force?