NEET Physics: Questions 953 - 957 of 2098

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Question number: 953

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A body of mass 10 kg moving with a velocity of 5 m/s, rebounds on a wall with same velocity. The impulse on the body is -

Choices

Choice (4) Response

a.

100 Ns

b.

30 Ns

c.

120 Ns

d.

60 Ns

Question number: 954

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

A bullet is fired from the gun. The gun recoils, the kinetic energy of the recoil shall be

Choices

Choice (4) Response

a.

double that of the kinetic energy of the bullet

b.

Equal to the kinetic energy of the bullet

c.

less than the kinetic energy of the bullet

d.

greater than the kinetic energy of the bullet

Question number: 955

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A cricket ball of mass 100 g is moving with a velocity of 10m/sec and is hit by a bat so that the ball is turned back with a velocity of 20 m/sec; the force on the ball acts for 0.01 sec, then the average force exerted by the bat on the ball will be

Choices

Choice (4) Response

a.

480 N

b.

40 N

c.

200 N

d.

48 N

Question number: 956

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

Two blocks of masses 5 kg and 3 kg connected by a rope of mass 2 kg are resting on frictionless floor. If a constant force of 40 N is applied to 6 kg block, tension in the rope at A, B, and C will respectively be –

Choices

Choice (4) Response

a.

30N, 25N, 20N

b.

28N, 24N, 20N

c.

25N, 30N, 20N

d.

30N, 20N, 25N

Question number: 957

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

The rate of burning of fuel in a rocket is 50 gm/sec. and comes out with and velocity 4 x 10 3 m/s. The force exerted by gas on rocket will be –

Choices

Choice (4) Response

a.

2.5 x l0 4 N

b.

250 N

c.

2.5 x l0 6 N

d.

200 N

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