Laws of Motion-Laws of Friction (NEET Physics): Questions 5 - 9 of 33

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Question number: 5

» 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 rests on B and moves with it.

Choices

Choice (4) Response

a.

1N

b.

2N

c.

3N

d.

5N

Question number: 6

» Laws of Motion » Laws of Friction

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.

5N

b.

1N

c.

3N

d.

2.5 N

Question number: 7

» Laws of Motion » Laws of Friction

MCQ▾

Question

The coefficient of static friction between a block of mass m and an inclined plane is n s = 0.3. What can be the maximum angle 9 of the inclined plane with the horizontal so that the block does not slip on the plane?

Choices

Choice (4) Response

a.

tan -1 (0.3)

b.

tan -1 (0.4)

c.

tan -1 (0.1)

d.

tan -1 (0.2)

Question number: 8

» Laws of Motion » Laws of Friction

MCQ▾

Question

If the coefficient of friction between an insect and bowl is u and the radius of the bowl is r, find the maximum height to which the insect can crawl in the bowl.

Choices

Choice (4) Response

a.

R[11μ2+1]

b.

R[11μ2+1]

c.

R[11μ21]

d.

R[1+1μ2+1]

Question number: 9

» Laws of Motion » Laws of Friction

MCQ▾

Question

Choose the correct statements -

(1) Kinetic friction is lesser than limiting friction.

(2) In rolling the surfaces at contact do not rub each other.

(3) If a body is at rest and no pulling force is acting on it, force of friction on it is zero.

(4) Kinetic friction is greater than limiting friction.

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

1, 2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

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