Laws of Motion (NEET Physics): Questions 95 - 99 of 114

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Question number: 95

» Laws of Motion » Laws of Friction

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

Choices

Choice (4) Response

a.

2N

b.

5N

c.

3N

d.

1N

Question number: 96

» 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: 97

» 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: 98

» 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)

Question number: 99

» Laws of Motion » Laws of Friction

MCQ▾

Question

A block is kept on a horizontal table. The table is undergoing simple harmonic motion of frequency 4 Hz in a horizontal plane. The coefficient of static friction between the block and the table surface is 0.70. Find the maximum amplitude of the table at which the block does not slip on the surface (g = 10 ms -2)

Choices

Choice (4) Response

a.

0.04 m

b.

0.03 m

c.

0.011 m

d.

0.02 m

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