Chhattisgarh Board Solutions for Chapter: Force and Laws of Motion, Exercise 5: Discuss and Write

Write down the mathematical representation of the second law of motion and write the meaning of all the symbols used in it.

Why does a person get a backward push on using a gun.

Why is the luggage kept on the roof of a bus tied up with a rope?

Prove that if the momentum of two bodies is same then the velocity of lighter body will be more than the velocity of heavier body.

According to the third law of motion, when we apply a force on a body, the body applies equal and opposite force on us. If that body is a car standing aside a road, probably it will not get in motion on the application of a force by us. A student argues that both the forces here are equal and opposite and hence they cancel each other. Express your thoughts regarding this argument and tell why the car does not move in the opposite direction.

The velocity of a body of mass $50 \mathrm{kg}$ moving at a uniform acceleration becomes $7 \mathrm{m} {\mathrm{s}}^{-1}$ from $4 \mathrm{m} {\mathrm{s}}^{-1}$ in $6 \sec$. Calculate the initial and final momentum of the body and the force applied on it.

Prove that the total momentum of two objects remains constant before and after their collision.

The force-time graph of a body of mass $3 \mathrm{kg}$ is drawn in the following figure. Find the momentum of the body during the time interval of $0$ to $10 \mathrm{s}$.