NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 830 - 834 of 2142

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Question number: 830

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A 20 g bullet pierces through a plate of mass m1 = 1 kg and then comes to rest inside a second plate of mass n1 = 2.98 kg. It is found that the two plates, initially at rest, now move with equal velocities. The percentage loss in the initial velocity of bullet when it is between m1 and m 2. (Neglect any loss of material of the bodies, due to action of bullet. ) will be -

Choices

Choice (4) Response

a.

25%

b.

30%

c.

45%

d.

20%

Question number: 831

» Laws of Motion » Laws of Friction

MCQ▾

Question

Block A weighs 4 N and block B weighs 8 N. The coefficient of kinetic friction is 0.25 for all surfaces. Find the force F to slide B at a constant speed when A rests on B and moves with it.

Choices

Choice (4) Response

a.

1N

b.

2N

c.

3N

d.

5N

Question number: 832

» Laws of Motion » Laws of Friction

MCQ▾

Question

Block A weighs 6 N and block B weighs 4 N. The coefficient of kinetic friction is 0.25 for all surfaces. Find the force F to slide B at a constant speed when A rests on B and moves with it.

Choices

Choice (4) Response

a.

5N

b.

1N

c.

3N

d.

2.5 N

Question number: 833

» Work, Energy and Power » Potential Energy

MCQ▾

Question

A tennis ball dropped from a height of 2 m rebounds only 1.5 f meter after hitting the ground. What fraction of energy is lost in the impact?

Choices

Choice (4) Response

a.

1/2

b.

1/8

c.

1/4

d.

1/16

Question number: 834

» Laws of Motion » Force and Inertia

MCQ▾

Question

In the situation shown in figure, both the pulleys and the strings are light and all the surfaces are frictionless. The acceleration of mass M, tension in the string PQ and force exerted by the clamp on the pulley, will respectively be (block A = M and B = 2M and force is 2Mg)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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