In a projectile motion the velocity,
1. | is always perpendicular to the acceleration |
2. | is never perpendicular to the acceleration |
3. | is perpendicular to the acceleration for one instant only |
4. | is perpendicular to the acceleration for two instants |
Two bullets are fired simultaneously, horizontally and with different speeds from the same place. Which bullet will hit the ground first?
1. | the faster one |
2. | the slower one |
3. | both will reach simultaneously |
4. | depends on the masses |
The range of a projectile fired at an angle of \(15^\circ\) is \(50\) m. If it is fired with the same speed at an angle of \(45^\circ,\) its range will be:
1. \(25\) m
2. \(37\) m
3. \(50\) m
4. \(100\) m
Two projectiles A and B are projected with angle of projection 15° for the projectile A and 45° for the projectile B. If RA and RB be the horizontal range for the two projectiles, then
1. RA < RB
2. RA = RB
3. RA > RB
4. the information is insufficient to decide the relation of RA with RB