| 1 |
When a body is whirled in a horizontal circle by means of string, the centripetal force is supplied by |
- A. Mass of body
- B. Velocity of a body
- C. Tension in the string
- D. Centripetal acceleration
|
| 2 |
The direction of angular acceleration is |
- A. Along the axis of rotation
- B. Perpendicular to the axis of rotation
- C. Opposite to axis of rotation
- D. None of these
|
| 3 |
Which of the following is not directed along the fixed axis of rotation. |
- A. Angular displacement
- B. Angular momentum
- C. Centripetal acceleration
- D. Angular acceleration
|
| 4 |
An elevator is moving up with an acceleration equal to 'g' An apparent weight of the body in an elevator is. |
- A. Zero
- B. Equal to real weight
- C. 2 mg
- D. 3 mg
|
| 5 |
A communication satellite is used ot reflect the signal of. |
- A. Microwaves
- B. Radio waves
- C. y rays
- D. x -rays
|
| 6 |
the height of the geostationary satellite above the equator is. |
- A. 35000 km
- B. 36000 km
- C. 34000 km
- D. 33000 km
|
| 7 |
In rotational motion the analogous of mass is |
- A. Angular acceleration
- B. Torque
- C. Moment of inertia
- D. Angular momentum
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| 8 |
A man of 1 kg is freefalling. The force of gravity is |
- A. 1 N
- B. 9.8 N
- C. 0.5 N
- D. Zero
|
| 9 |
A body starting from rest attains angular acceleration of 5 rad s-2 in 2 second final angular velocity will be. |
- A. 10 rad s-1
- B. 7 rad s-1
- C. 3 rad s-1
- D. 2 rad s-1
|
| 10 |
A wheel of radius 50 cm having an angular speed of a rad /s have linear speed. |
- A. 1.5 m/s
- B. 3.5 m/s
- C. 2.5 m/s
- D. 4.5 m/s
|