Dhiren M Doshi Solutions for Chapter: Motion, Exercise 3: Check Your Progress

Give one example of the following: Negative acceleration.

Give one example of the following: Uniform acceleration.

Give one example of the following: Non-uniform acceleration.

Give one example of the following: The speed of an object first increases remains constant for some time and then decreases.

Distinguish between the following: Acceleration and retardation.

Distinguish between the following: Uniform acceleration and non-uniform acceleration.

A car accelerates uniformly from $18 \mathrm{km}/\mathrm{h}$ to $36 \mathrm{km}/\mathrm{h}$ in $5 \mathrm{s}$. Calculate the acceleration of the car.

Starting from rest, Nikita paddles her bicycle to attain a velocity of $5 \mathrm{m}/\mathrm{s}$ in $25 \mathrm{s}$. Then she applies brakes so that the velocity of the bicycle comes down to $4 \mathrm{m}/\mathrm{s}$ in the next $5 \mathrm{s}$. Calculate the acceleration of the bicycle in both cases.