NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 874 - 877 of 2320

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Question number: 874

» Laws of Motion » Force and Inertia

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Question

A body of mass 60 kg is pulled by a rope of length 8 m on a surface by a force of 128N applied at the other end. The force that is acting on 60 kg mass, if the linear density of rope is 0.5 kg/m will be –

Choices

Choice (4)Response

a.

128 N

b.

116 N

c.

92 N

d.

120 N

Question number: 875

» Laws of Motion » Laws of Friction

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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 and B are connected by a light cord passing over a smooth Pulley.

Choices

Choice (4)Response

a.

5N

b.

6N

c.

3N

d.

2N

Question number: 876

» Kinematics » Average Speed and Instantaneous Velocity

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Question

A bullet of mass 10 g travelling horizontally with a velocity of 600 m/s strikes a

Block of wood of mass 590 g which rests on a rough horizontal floor. After impact the block and the bullet move together and come to rest when the block has travelled a distance of 15 m. The coefficient of friction between the block and the floor will be - (Duration of impact is very short)

Choices

Choice (4)Response

a.

½

b.

1/3

c.

2/3

d.

¾

Question number: 877

» Kinematics » Uniformly Accelerated Motion

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MCQ▾

Question

Two blocks of masses 6 kg and 4 kg connected by a rope of mass 2 kg are resting on frictionless floor. If a constant force of 60 N is applied to 6 kg block, tension in the rope at A, B, and C will respectively be –

Choices

Choice (4)Response

a.

20N, 30N, 25N

b.

30N, 20N, 25N

c.

30N, 25N, 20N

d.

25N, 30N, 20N

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