| 1 |
A mass of 1 kg is freely falling. The force of gravity is. |
- A. 1 N
- B. 9.8 N
- C. 0.5 N
- D. Zero
|
| 2 |
Total change in momentum of an isolated system is |
- A. Always (+) ve
- B. Always (-) ve
- C. Has maximum value
- D. Zero
|
| 3 |
An object of mass 1 kg moving with acceleration 0 1 ms-2 will experience a force of. |
- A. 10<sup>-2</sup> N
- B. 10<sup>-3</sup> N
- C. 1 N
- D. 1 dyne
|
| 4 |
Inertia may expressed in |
- A. Kg
- B. Newton
- C. Watt
- D. Joule
|
| 5 |
When speed of a body is doubled then its |
- A. K.E. is doubled
- B. P.E. is doubled
- C. Acceleration of doubled
- D. Momentum is doubled
|
| 6 |
The angle of projection for which its maximum height and horizontal range are equal |
- A. 46 <sup>o</sup>
- B. 56<sup>o</sup>
- C. 66<sup>o</sup>
- D. 76<sup>o</sup>
|
| 7 |
A ball is thrown up with 20 ms-1 at an angle of 60 <sup>o</sup>with x-axis , the velocity of the ball at the top position is. |
- A. 0 ms-1
- B. 10 ms-1
- C. 20 ms-1
- D. 16 ms-1
|
| 8 |
The slope of velocity time graph shows |
- A. Total distance covered
- B. Average acceleration
- C. Instantaneous acceleration
- D. Torque
|
| 9 |
For a rocket , the change in momentum per second of the ejecting gases is equal. |
- A. Acceleration of the rocket
- B. Momentum of rocket
- C. Velocity of rocket
- D. Thrust acting on rocket
|
| 10 |
When average velocity becomes equal to instantaneous than body is called moving with. |
- A. Instantaneous acceleration
- B. Constant acceleration
- C. Constant velocity
- D. Variable velocity
|