Rest and Motion

An object is said to be in motion if its position _____ with respect to another object.

A bullet loses $\frac{1}{20}$ of its velocity after penetrating a plank. How many planks are required to stop the bullet?

Which of the following shows the velocity (v) - time (t) graph for falling apple?

What is the state of the body when its position does not changes with time?

Change in the state of motion means

What will happen if the force applied to an object is in the direction of its motion?

Which of the following changes are possible, when a force is applied to an object?

What happens to the speed of a moving object when force is applied to it?

What could be the possible consequences when an equal amount of force is applied to an object from two opposite directions?

What will happen if the direction of the force applied is opposite to the movement of an object?

The objects which do not change their position with time are said to be.

An object is said to be at rest when

A boy is sitting in a bus moving with a speed of $60 \mathrm{km} {\mathrm{h}}^{-1}$. The boy is