| 1 |
The shortest distance between two points is called |
- A. Distance
- B. Amplitude
- C. Displacement
- D. Is a number
|
| 2 |
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
|
| 3 |
The velocity of a free falling body just before Hattin the ground is 9.8 ms-1, the height through which is fall be |
- A. 98 m
- B. 19.6 m
- C. 4.9 m
- D. 9.8 m
|
| 4 |
The ballistic missiles are used only for |
- A. Long range
- B. Short range
- C. Medium range
- D. Constant range
|
| 5 |
The shape of trajectory of short range projectile is |
- A. Straight line
- B. Circle
- C. Elliptical
- D. Parabolic
|
| 6 |
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
|
| 7 |
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
|
| 8 |
The acceleration of a projectile along x axis is. |
- A. Zero
- B. Increase
- C. Decrease
- D. Equal to 'g'
|
| 9 |
A ball is thrown up vertically, it takes 3 sec to reach maximum height. Its initial velocity is. |
- A. 10 ms-1
- B. 12.2 ms-1
- C. 15 ms-1
- D. 29.4 ms-1
|
| 10 |
The trajectory of a projectile is. |
- A. Circle
- B. Parabola
- C. Hyperbola
- D. Straight line
|