| 1 |
The dimensions of work are |
- A. MLT<sup>-1</sup>
- B. MLT<sup>-2</sup>
- C. ML<sup>2</sup>T<sup>-2</sup>
- D. ML<sup>-1</sup>T<sup>-1</sup>
|
| 2 |
The SI unit of work is |
- A. Newton
- B. Joule
- C. Mol
- D. Calorie
|
| 3 |
A body has P.E. = mgh, when it is at height 'h' from the ground. At the point at the distance 'x' below from the top its P.E. with |
- A. mgh
- B. mgx
- C. mg(x-h)
- D. None of these
|
| 4 |
When the rocket moves away from the earth, the work against gravity |
- A. Remains constant
- B. Varies directly with distance
- C. Varies inversely with distance
- D. Varies inversely with square of distance
|
| 5 |
Kilo watt hour is the unit of |
- A. Power
- B. Energy
- C. Force
- D. Torque
|
| 6 |
SI unit of work |
- A. Newton
- B. Walt
- C. Pascal
- D. Joule
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| 7 |
If a body of mass 5 kg is raised vertically through a distance of 1 m, then work done is. |
- A. 49 J
- B. 4.9 J
- C. 490 J
- D. 0.49 J
|
| 8 |
If velocity 'v' of an object is double, then K.E. because. |
- A. Remain same
- B. Sixteen times
- C. Double
- D. Four times
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| 9 |
The formula for the power is |
- A. P= W/d
- B. P=W/v
- C. P=W/t
- D. P=Wt
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| 10 |
The power needed to lift a mass of 5000 g to height of 1 m in 2 secnd is |
- A. 2.45 watt
- B. 24.5 watt
- C. 245 watt
- D. 2.45 watt
|