NEET (NTA-National Eligibility cum Medical Entrance Test) Physics: Questions 913 - 917 of 2142

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Question number: 913

» Laws of Motion » Laws of Friction

MCQ▾

Question

It is easier to pull a body than to push, because -

Choices

Choice (4) Response

a.

the body does not move forward when pushed

b.

the coefficient of friction is more in pushing than that in pulling

c.

the friction force is more in pushing than that in pulling

d.

None of the above

Question number: 914

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A bullet of mass 20 g hits a block of mass 1.98 kg suspended from a massless string of length 100 cm and sticks to it. The bullet flies down at an angle of 30° to the horizontal with a velocity of 200 m/s. Through what height the block will rise-

Choices

Choice (4) Response

a.

0.75 m

b.

0.45 m

c.

0.30 m

d.

0.15 m

Question number: 915

» Work, Energy and Power » Work Done

MCQ▾

Question

A boy pulls a 5 kg block 20 meters along a horizontal surface at a constant speed with a force directed 45° above the horizontal. If the coefficient of kinetic friction is 0.20, how much work does the boy do on the block?

Choices

Choice (4) Response

a.

11.55 J

b.

115 J

c.

163.32 J

d.

150 J

Question number: 916

» Laws of Motion » Laws of Friction

MCQ▾

Question

A body of mass 600 g slides on a rough horizontal surface. If the frictional force is 8.0 N, the magnitude of the contact force is (g = 10 m/s 2)

Choices

Choice (4) Response

a.

5.0 N

b.

4.0 N

c.

7.0 N

d.

3.0 N

Question number: 917

» Laws of Motion » Static and Kinetic Friction

MCQ▾

Question

The coefficient of static friction between the two blocks shown in figure is a. and the table is smooth. What maximum horizontal force F can be applied to the block of mass M so that the blocks move together?

Choices

Choice (4) Response

a.

2µg (M + m)

b.

µg (M - m)

c.

µg (M + m)

d.

µg (M + 2m)

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