A P Shreelatha and Neetu Singh Solutions for Chapter: Motion, Exercise 5: TEST YOURSELF

Define uniform circular motion.

What is the displacement of a satellite when it makes a complete round along its circular path?

Write the three equations of motion for

(a) Velocity-time relation (b) Position-time relation (c) Position-velocity relation

Is it possible for a body to have a constant speed but an accelerated motion?

What is the average velocity and displacement of a body moving in a horizontal circle with constant speed?

A train is moving with a velocity of $90 \mathrm{km}/\mathrm{h}$. When the driver applies brakes the train comes to halt in $10 seconds$ .

(a) Calculate the retardation of the train.

(b) Distance covered by the train in $10$ seconds.                                                                                     

A racing car initially at rest, attains a speed of $198 \mathrm{km}/\mathrm{h}$ in $10 \mathrm{s}.$ Calculate the distance covered by the racing car from start and the acceleration.

The brakes applied to a car produce a uniform retardation of $1.2 \mathrm{m}/{\mathrm{s}}^2$. Before stopping, the car covers a distance of $12 \mathrm{m}$. How long were the brakes applied?