NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 832 - 836 of 2320

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Question number: 832

» Laws of Motion » Laws of Friction

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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.

3N

c.

2N

d.

5N

Question number: 833

» Laws of Motion » Laws of Friction

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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.

2.5 N

b.

5N

c.

3N

d.

1N

Question number: 834

» Work, Energy and Power » Potential Energy

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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.

1/4

b.

1/8

c.

1/2

d.

1/16

Question number: 835

» Laws of Motion » Force and Inertia

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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.

b.

c.

d.

Question number: 836

» Work, Energy and Power » Work Done

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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.

98 J

b.

235.2 J

c.

196 J

d.

117.6 J

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