An oblique projectile is projected with a speed u. It takes time t, to reach the maximum height and time t, to come back to the ground. Air resistance is not neglected, then is
(1) > 1
(2) < 1
(3) = 1
(4) Depends on the angle of projection
The speed of a projectile projected from level ground at its maximum height is found to be half of its speed of projection (u). Its maximum height is:
1.
2.
3.
4.
A body moved along x-axis and y-axis according to the equation,
What is the trajectory followed by the body?
1.
2.
3.
4.
A particle of mass \(m\) is projected with a velocity at an angle with the horizontal into a uniform gravitational field. The slope of the trajectory varies with horizontal distance \(x\) as:
1. | 2. | ||
3. | 4. |
A projectile thrown at an angle 30° with horizontal from the level ground reaches a maximum height of 20 m. What will be the maximum height if it is thrown at an angle 60° with the same speed?
(1) 20 m
(2) 30 m
(3) 50 m
(4) 60 m
A body moving in a uniform circular motion with speed v. The magnitude of the change in its velocity after it rotates by an angle 120° is:
1. \(2v\)
2. \(\sqrt{3}v\)
3. \(v\)
4. \(\frac{\sqrt{3}}{2}v\)
A car moves on a circular path such that its speed is given by v = Kt, where K =constant and t is time. Also given: radius of the circular path is r. The net acceleration of the car at time t will be:
1.
2. 2K
3. K
4.
An object of mass 10 kg is projected from level ground with speed 40 m/s at angle 30° with horizontal. The rate of change of momentum of object [in SI units] 1 second after the projection is [neglect air resistance]
(1) 100
(2) 50
(3) 25
(4) 75
A particle is projected horizontally with speed 20 m/s from a cliff of height 20 m. The magnitude of the velocity of particle when it reaches the ground
1. 20 m/s
2. 40 m/s
3. 20 m/s
4. Zero
A projectile is thrown with an initial velocity of 20 m/s at an angle of 60° with horizontal, then the angle of the velocity of the projectile with horizontal after time 0.732 sec is:
(1) 45°
(2) 30°
(3) 0°
(4) 15°