## Problem 1

- its velocity and acceleration are both constant.
- its velocity is constant but the acceleration changes.
- its acceleration is constant but the velocity changes.
- its velocity and acceleration both change.

## Problem 2

_{1}, and m

_{2}move in circles of radii r

_{1}, and r

_{2}respectively. If they complete the circle in equal time, the ratio of their angular speeds $\omega$

_{1}, $\omega$

_{1}is:

- m
_{1}/m_{2} - r
_{1}/r_{1} - m
_{1}r_{1}/ m_{2}r_{2} - 1

## Problem 3

_{a}and N

_{b}when it is at the points A and B, respectively.

- N
_{a}= N_{b} - N
_{a}> N_{b} - N
_{a}< N_{b} - insufficient information to decide the relation between N
_{a}and N_{b}

## Problem 4

- $\frac{m v^{2}}{r}$ towards the center.
- $\frac{m v^{2}}{r}$ away from the center.
- $\frac{m v^{2}}{r}$ along the tangent through the particle.
- zero

## Problem 5

_{o}in a circle of radiua 'a'. The centrifugal force on the particle is:

- m$\omega$
^{2}a - m$\omega$
_{o}^{2}a - m$ (\frac{\omega + \omega_{o}}{2})^{2}$a
- m$\omega \omega$
_{o}a

## Problem 6

^{2}. The particle is now shifted to a new position to make the radius half of the original value. The new values of the speed and acceleration will be :

- 10 cm/s, 10 cm/s
^{2} - 10 cm/s, 80 cm/s
^{2} - 40 cm/s, 10 cm/s
^{2} - 40 cm/s, 40 cm/s
^{2}

## Problem 7

- towards the centre
- away from the centre
- along a tangent
- will stop

## Problem 8

- 1 cm
- 3 cm
- 4 cm
- 8 cm

## Problem 9

## Problem 10

## Problem 11

## Problem 12

## Problem 13

## Problem 14

## Problem 15

## Problem 16

## Problem 17

## Problem 18

## Problem 19

## Problem 20

## Problem 21

## Problem 22

## Problem 23

## Problem 24

## Problem 25

## Problem 26

## Problem 26

## Problem 27

## Problem 28

## Problem 29

## Problem 30

Answers

1 - d) | 2 - d) | 3 - c) | 4 - d) | 5 - b) |

6 - a) | 7 - | 8 - c) | 9 - | 10 - |