| 1 |
Average acceleration is a |
- A. Scalar quantity
- B. Vector quantity
- C. <div>(-) ve quantity</div>
- D. None of these
|
| 2 |
Rate of change of displacement is called |
- A. Speed
- B. Velocity
- C. Kinetic energy
- D. None of these
|
| 3 |
In the absence of external force, the change in momentum is. |
- A. Zero
- B. Constant
- C. Decreasing
- D. Increasing
|
| 4 |
The dimensional unit of impulse is. |
- A. [MLT]
- B. [MLT-1]
- C. [ML-1T-1]
- D. [M-1L-1T-1]
|
| 5 |
A force of 10 N acts on a body of mass 5 kg in one second. The change in its momentum will be. |
- A. 10 kgms-1
- B. 50 kg ms-1
- C. 2 kg ms-1
- D. 20 kg ms-1
|
| 6 |
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
|
| 7 |
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
|
| 8 |
A man of 5000 kg moves with an acceralation of 1 ms-2 force acting on it is. |
- A. 5 N
- B. 500 N
- C. 50 N
- D. 5000 N
|
| 9 |
Before the launch of a rocket the mass of fuel of the rocket is approximately consists of. |
- A. 60%
- B. 50%
- C. 80%
- D. 100%
|
| 10 |
If the initial velocity of a projectile becomes doubled, the time of fight will be. |
- A. Same
- B. 4 times
- C. Double
- D. 3 times
|