Laws of Motion-Laws of Friction (NEET Physics): Questions 13 - 17 of 33

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Question number: 13

» 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.

5N

b.

3N

c.

2N

d.

6N

Question number: 14

» Laws of Motion » Laws of Friction

MCQ▾

Question

Two cars of unequal masses use similar tyres. If they are moving at the same initial speed, the minimum stopping distance -

Choices

Choice (4) Response

a.

is same for both cars

b.

is smaller for the heavier car

c.

is smaller for the lighter car

d.

Depends on the volume of the car

Question number: 15

» Laws of Motion » Laws of Friction

MCQ▾

Question

The work done by a person in carrying a box of mass 10 kg through a vertical height of 10 m is 4900 J. The mass of the person is -

Choices

Choice (4) Response

a.

60 kg

b.

130 kg

c.

50 kg

d.

40 kg

Question number: 16

» Laws of Motion » Laws of Friction

MCQ▾

Question

Find the maximum value of M/m in the situation shown in figure so that the system remains at rest. Friction coefficient at both the contacts is u.

Find the maximum value of M/m

Find the Maximum Value of M/m

System is at rest and friction coefficient at both the contacts is u

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Passage

Read the passage given below and answer the questions that follows: A block of mass 1 kg is placed on a rough horizontal surface. A spring is attached to the block whose other end is joined to a rigid wall, as shown in the figure. A horizontal force is applied on the block so that it remains at rest while the spring is elongated by x.

Equation

Let F max and F min be the maximum and minimum values of force F for which the block remains a equilibrium. For a particular x,

F max - F min = 2N

Also shown is the variation of F max + F min versus x, the elongation of the spring.

Question number: 17 (1 of 3 Based on Passage) Show Passage

» Laws of Motion » Laws of Friction

MCQ▾

Question

The coefficient of friction between the block and the horizontal surface is -

Choices

Choice (4) Response

a.

0.1

b.

0.3

c.

0.2

d.

0.4

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