Chhattisgarh Board Solutions for Chapter: Motion, Exercise 2: Exercise

The direction of velocity of a body depends on _____.

Write all the three equations of motion and explain the symbols used in them.

An athlete covers one round of a circular track of $7 \mathrm{m}$ radius is $44 \mathrm{s}$. How much distance(in metre) will it cover in $1$ minute? (Fill up to one decimal place)

Using the graphical method derive the second equation of motion $s=ut+\frac{1}{2}a{t}^2$

Neeraj reaches school in a car at an average speed of $20 \raisebox{1ex}{$\mathrm{km}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{h}$}\right.$. While returning; his speed becomes $30 \raisebox{1ex}{$\mathrm{km}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{h}$}\right.$ due to lesser crowd. What is the average speed of Neeraj's car for the whole journey?

A ball is dropped from the top of a $20 \mathrm{m}$ high tower. If its velocity is increasing with an acceleration of $10 \raisebox{1ex}{$\mathrm{m}$}\!\left/ \!\raisebox{-1ex}{${\mathrm{s}}^2$}\right.$ then at what speed will the ball hit the ground? How much time will it take to hit the ground?
 

A car is moving on a straight road at a uniform acceleration. The velocity of the car at different times is given below. Draw its velocity-time graph and calculate its acceleration and also find out the distance covered by it in $30$ seconds.

In the following figure, the position-time graph for an object at different times is shown. Calculate the speed of the object during

(i) A to B

(ii) B to C

(iii) C to D