| 1 |
The large unit of work is: |
- A. Kilowatt
- B. Kilo joul
- C. Mega joul
- D. Both B and C
|
| 2 |
If mass of body is 10 kg travelling with speed of light, how much energy is generated? |
- A. E = 9 × 1017 J
- B. E = 9 × 1015 J
- C. E = 9 × 1018 J
- D. E = 9 × 1016 J
|
| 3 |
A crate is moved by pulling the rope attached to it. it moves 10 m on straight horizontal read by a force of 100 N. How much work will be done when the rope is making an angle of 30° with the road? |
- A. 5 Joules
- B. 86 Joules
- C. 707 Joules
- D. 866 Joules
|
| 4 |
if a body of a mass 'm' is moving with velocity 'v' then its K.E. is given by |
- A. K.E. = 1/2 mv
- B. K.E. = 1/2 mv2
- C. K.E. = mv2
- D. K.E. = 1/2 m2v
|
| 5 |
When a body is lifted through a height h, the work donw on it appears in the form of its. |
- A. Kinetic energy
- B. Potential energy
- C. Elastic energy
- D. Geothermal energy
|
| 6 |
The unit of work is : |
|
| 7 |
If the velocity of the body becomes double then its kinetic energy will: |
- A. Remain the same
- B. Become double
- C. Become four times
- D. Become half
|
| 8 |
If f = 40 N is applied and bus is move 1m than work is : |
- A. 40 J
- B. 60 J
- C. 80 J
- D. No work
|
| 9 |
The potential energy of a body of mass 'm' placed at a height 'h' above the surface of   earth is equal to |
- A. P.E. = mg
- B. P.E. = mgh
- C. P.E. = 3mgh
- D. P.E. = 2mgh
|
| 10 |
The work done in lifting a brick of mass 2 kg through a height of 5 m above ground will be: |
- A. 2.5 J
- B. 10 J
- C. 50 J
- D. 100 J
|
