NEET Physics: Questions 832 - 836 of 2098

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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.

2g,12g,2Mg

b.

13g,23Mg,3Mg

c.

13g,13Mg,23Mg

d.

23g,13Mg,23Mg

Question number: 835

» Work, Energy and Power » Work Done

MCQ▾

Question

A chain of linear density 3 kg/m and length 8 m is lying on the table with 4 m of chain hanging from the edge. The work done in lifting the chain on the table will be –

Choices

Choice (4) Response

a.

235.2 J

b.

117.6 J

c.

98 J

d.

196 J

Question number: 836

» Work, Energy and Power » Elastic and Inelastic Collisions

MCQ▾

Question

In an elastic collision-

Choices

Choice (4) Response

a.

Momentum is not conserved but kinetic energy is conserved

b.

Momentum is conserved but kinetic energy is not conserved

c.

Neither momentum nor kinetic energy is conserved

d.

the momentum and kinetic energy are conserved

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