A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is

A bullet is fired from the rifle. If the rifle recoils freely, then the kinetic energy of the rifle is ___________

A

Less than the kinetic energy of the bullet

B

More than the kinetic energy of the bullet

C

Same as the kinetic energy of the bullet

D

Equal or less than the kinetic energy of the bullet

A bullet of mass 12 g is fired from a rifle. The bullet takes 0.006 second to move through its barrel and leaves it with a velocity of 300 m/s. What is the force exerted on the bullet by the rifle?

A

720 Newton

B

180 Newton

C

900 Newton

D

600 Newton

Statement I When a gun is fired, i.e. it placing pushes back with much less velocity than the velocity of the bullet.
Statement II Velocity of the recoiling gun is less because the gun is much heavier than bullet.
According to the Principle of conservation of momentum when the gun is fired, momentum of gun and bullet system remains constant.

A

Both the statements are individually true and statement II is the correct explanation of statement I

B

Both the statements are individually true but statement II is not the correct explanation of statement I

C

Statement I is true, but statement II is false

D

Statement I is false, but statement II is true

Shot from a rifle. What will be the kinetic energy of the rifle if the rifle comes backwards without stopping?

A

More than the kinetic energy of the bullet

B

Less than the kinetic energy of the bullet

C

Equal to the kinetic energy of the bullet

D

Zero

A bullet fired from a rifle travels at an average speed of 2520 km/hr. It hits the target after 0.2 seconds. How far (in m) is the target from the rifle?

A

70

B

140

C

100

D

200

A bullet of mass 0.05 kg is fired with a velocity of 120 ms-1 from a rifle of mass 4 kg. What will be the recoil velocity of the rifle?

A

1.5 ms^-1

B

1.25 ms-1

C

1.75 ms-1

D

1.0 ms-1

Match the following Device Conversion of Energy (a) Windmill (i) Chemical Energy to electrical energy (b) Bulb (ii) Kinetic Energy to Electrical Energy (c) Electrical Cell (iii) Sound Energy to Electrical energy (d) Microphone (iv) Electrical Energy to Light Energy

A

(a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)

B

(a) - (ii), (b) - (iv), (c) - (i), (d) - (iii)

C

(a) - (ii), (b) - (iii), (c) - (i), (d) - (iv)

D

(a) - (iii), (b) - (ii), (c) - (iv), (d) - (i)

What is the kinetic energy of a bullet when a bullet is fired from a gun?

A

Less than gun

B

Infinite

C

More than gun

D

equivalent to gun

What does hydropower change A. Kinetic energy to electrical energy B. Mechanical energy from electrical energy C. Chemical energy to electrical energy D. Wind energy to electrical energy

A

C

B

C

D

A

In which of the following energy is kinetic energy?
1. A bullet fired by a gun
2. A fast moving railway engine
3. Speed of a simple pendulum

A

1 and 3

B

2 and 3

C

1 and 2

D

1, 2 and 3

A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is

Related Questions