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 an angle of the projection \(15^\circ\) for the projectile \(A\) and \(45^\circ\) for the projectile \(B.\) If \(R_A\) and \(R_B\) is the horizontal range for the two projectiles, then:
1. | \(R_A < R_B\) |
2. | \(R_A = R_B\) |
3. | \(R_A > R_B\) |
4. | the information is insufficient to decide the relation of \(R_A\) with \(R_B\) |