Laws of Motion (NEET Physics): Questions 59 - 63 of 114

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Question number: 59

» Laws of Motion » Laws of Friction

MCQ▾

Question

A block of mass 2 kg is placed on the floor. The coefficient of static friction is 0.4. A force F of 2.5 N is applied on the block, as shown. Calculate the force of friction between the block and the floor, (g = 9.8 ms -2)

Choices

Choice (4) Response
a.

zero

b.

7.84 N

c.

2.5 N

d.

25 N

Question number: 60

» 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 3 Hz in a horizontal plane. The coefficient of static friction between the block and the table surface is 0.72. 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.

0.03 m

b.

0.02 m

c.

0.01 m

d.

0.04 m

Question number: 61

» 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: 62

» 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: 63

» Laws of Motion » Force and Inertia

MCQ▾

Question

In the situation shown in figure, both the pulleys and the strings are light and all the surfaces are frictionless. The acceleration of mass M, tension in the string PQ and force exerted by the clamp on the pulley, will respectively be (block A = M and B = 2M and force is 2Mg)

Choices

Choice (4) Response
a.

2g,12g,2Mg

b.

13g,23Mg,3Mg

c.

13g,13Mg,23Mg

d.

23g,13Mg,23Mg

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