MODEL QUESTIONS

A man leaves his house and goes on an automobile trip returning to his house in a time $\Delta t$, after he left it. His average velocity for the trip is _____.

A stone is released from an elevator going up with an acceleration $a$. This acceleration of the stone after the release is _____.

A body can have east ward velocity while experiencing a west-ward acceleration.

A body is moving with uniform velocity in one frame $A$ then there is another frame $B$ in which it is accelerating.

A lorry and a car moving with same kinetic energy are brought to rest by the application of brakes which provide equal retarding forces. Both come to rest in equal distance. Will the value of distance or displacement travelled be same for both lorry and car?

A car moving due east takes a turn and moves due north, the speed remaining unchanged. The acceleration of the car is zero.

A train is moving with a speed of $60 \mathrm{km}/\mathrm{hr}$ and a car is moving by its side in the same direction with a speed of $20 \mathrm{km}/\mathrm{hr}$. The speed of the car relative to train is $80 \mathrm{km}/\mathrm{hr}$.

Two cars $\mathrm{A}$ and $\mathrm{B}$ are moving in the same direction with equal speeds. A passenger in the car $\mathrm{A}$ finds that the car $\mathrm{B}$ is at rest.