| 1 |
The minimum number of correctly positioned communication satellites to cover whole populated earth is. |
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| 2 |
A man of mass 5 kg is falling freely, the fore acting on it will be |
- A. 5 N
- B. 9.8 N
- C. 19.6 N
- D. 49 N
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| 3 |
The direction of angular velocity is determined. |
- A. Left hands rule
- B. Head to tail rule
- C. Right hand rule
- D. General rule
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| 4 |
If a body revolves under centripetal force its angular acceleration is |
- A. Non zero
- B. Variable
- C. Increasing
- D. Zero
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| 5 |
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
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| 6 |
International Telecommunication satellite |
- A. 4,6,8 and 10 Hz
- B. 4,6,11 and 14 GHz
- C. 4,6,8 and 12 Hz
- D. 4,8,11 and 16 GHz
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| 7 |
Centripetal force perform |
- A. Maximum work
- B. Minimum work
- C. Negative work
- D. No work
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| 8 |
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
|
| 9 |
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
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| 10 |
The motion of a body moving along a circular path is called. |
- A. Translational motion
- B. Angular motion
- C. Vibratory motion
- D. Linear motion
|