Laws of Motion (NEET Physics): Questions 75 - 79 of 114

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Question number: 75

» Laws of Motion » Static and Kinetic Friction

MCQ▾

Question

Assuming the length of a chain to be L and coefficient of static friction u. Compute the maximum length of the chain which can be held outside a table without sliding.

Choices

Choice (4) Response

a.

2μL1+μ

b.

3μL1+μ

c.

μL1μ

d.

μL1+μ

Question number: 76

» Laws of Motion » Momentum

MCQ▾

Question

A force of 1 N is applied on a particle for 3 sec, the change in momentum will be -

Choices

Choice (4) Response

a.

3 Ns

b.

6 Ns

c.

2 Ns

d.

4 Ns

Question number: 77

» Laws of Motion » Force and Inertia

MCQ▾

Question

A body of mass 60 kg is pulled by a rope of length 8 m on a surface by a force of 128N applied at the other end. The force that is acting on 60 kg mass, if the linear density of rope is 0.5 kg/m will be –

Choices

Choice (4) Response

a.

128 N

b.

116 N

c.

120 N

d.

92 N

Question number: 78

» 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: 79

» Laws of Motion » Force and Inertia

MCQ▾

Question

A body of mass 50kg resting on a smooth inclined plane is connected by a massless inextensible string passing over a smooth pulley, at the top of the inclined plane have another mass of 40 kg as shown in the figure. The distance through which 50 kg mass fall in 4 sec will be - (The angle of the inclined plane is 30°)

Inclined plane with the mass resting on the plane

Inclined Plane With the Mass Resting on the Plane

Mass resting on inclined plane

Choices

Choice (4) Response

a.

1.304 m

b.

1.63m

c.

16.3m

d.

13.04 m

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