NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 875 - 878 of 2184

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Question number: 875

» Kinematics » Average Speed and Instantaneous Velocity

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MCQ▾

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: 876

» 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

Question number: 877

» Work, Energy and Power » Potential Energy

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MCQ▾

Question

A tennis ball dropped from a height of 3 m rebounds only 1.6 meter after hitting the ground. What fraction of energy is lost in the impact?

Choices

Choice (4) Response

a.

1.26

b.

0.466

c.

2.45

d.

0.233

Question number: 878

» Kinematics » Average Speed and Instantaneous Velocity

Edit
MCQ▾

Question

A bullet of mass 10 g travelling horizontally with a velocity of 300 m/s strikes a

block of wood of mass 290 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.

1/3

b.

½

c.

¾

d.

2/3