Chap 03 - Force and Motion

A bomb released from a jet plane is an example of

• linear motion.

• circular motion.

• random motion.

• projectile motion.

In a battle field, to obtain the maximum range by a missile fired by an army tank, the missile must be launched at an angle of

• 0

• 30

• 45

• 60

The projectile motion is a good case of

• one dimensional motion.

• two dimension motion.

• three dimensional motion.

• four dimensional motion.

If a projectile is fired with the initial velocity of 90 m/s to hit a ground level target, then its maximum possible horizontal range will be

(where the value of 'g' is 9.8 m/s² and air resistance is negligible)

• 1.1 m

• 9.2 m

• 8.3 x 10² m

• 8.8 x 10² m

Water flows out from a pipe at the rate of 5 m/s and strikes a wall normally with a force of 15 N. The mass flow rate of water from the pipe is

• 0 kg/s

• 3 kg/s

• 6 kg/s

• 10 kg/s

Which of the following options describe a ballistic missile after its ascent?

• A powered and guided missile

• A powered and unguided missile

• An unpowered and guided missile

• An unpowered and unguided missile

A cricket player catches a ball in his hand moving backward in the direction of the motion of the ball. This action of the player reduces the force of impact on his hand because

• impulse in increased.

• acceleration is reduced.

• speed impact is reduced.

• time before impact is increased.

If a body of less mass collides elastically with a very massive body is at rest, then the body of less mass will bounce back with

• the same speed.

• half of its initial speed.

• double its initial speed.

• one-fourth of its initial speed.

The given diagram shows a velocity - time graph.

In which of the following regions is in the acceleration negative?

• V to W

• W to X

• X to Y

• Y to Z

If a rock is thrown in the cosmos which is free from all gravitational and frictional forces, then the rock will

• not move.

• gradually stop.

• continue its motion.

• possess angular acceleration.