Laws of Motion-Laws of Friction (NEET Physics): Questions 25 - 28 of 33

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Question number: 25

» Laws of Motion » Laws of Friction

MCQ▾

Question

A body of mass 800 g slides on a rough horizontal surface. If the frictional force is 6.0 N, the angle made by the contact force on the body with the vertical will be

Choices

Choice (4) Response

a.

27°

b.

63°

c.

53°

d.

37°

Question number: 26

» Laws of Motion » Laws of Friction

MCQ▾

Question

A block placed on a horizontal surface is being pushed by a force F making an angle 0 with the vertical, if the coefficient of friction is|x, how much force is needed to get the block just started?

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 27

» Laws of Motion » Laws of Friction

MCQ▾

Question

Choose the correct options -

(1) Friction always opposes the motion

(2) Friction may opposes the motion

(3) If the applied force is increased the force of static friction remains constant.

(4) If the applied force is increased the force of static friction also increases upto limiting friction.

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

Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

1 and 2 are correct

c.

2 and 4 are correct

d.

1 and 3 are correct

Question number: 28

» 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 is held at rest.

Choices

Choice (4) Response

a.

4N

b.

1N

c.

2N

d.

3.5N

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