Laws of Motion (KVPY Stream-SA (Class 11) Physics): Questions 13 - 16 of 21

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Question number: 13

» Laws of Motion » Static and Kinetic Friction

MCQ▾

Question

A block, resting on the top of a plane inclined at 450 with the horizontal, slides down with an acceleration of g2 . Calculate the coefficient of kinetic friction.

Choices

Choice (4) Response

a.

212

b.

2

c.

21

d.

22

Question number: 14

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

Question

A massless platform of hard paper is kept on a light elastic spring as figure shows. When a particle of mass 500 g is dropped on the platform from a height of 0.32 m, the particle strikes the platform and compresses the spring by 0.05 m. From what height the particle is dropped to get a compression of 0.08 m?

A platform attached on the spring

A Platform Attached on the Spring

In figure a platform of hard paper is attached on the spring. And a particle of mass 500 gm is dropped from height 0.32 m.

Choices

Choice (4) Response

a.

0.78

b.

0.68

c.

0.86

d.

0.70

Question number: 15

» Laws of Motion » Dynamics of Uniform Circular Motion

MCQ▾

Question

A solid sphere of mass 5 kg rolls on a smooth horizontal surface at 12ms . It then rolls up a smooth inclined plane of inclination 600 with the horizontal. The height attained by the sphere before it stops is

Choices

Choice (4) Response

a.

9.8 m

b.

10.28 m

c.

11.14 m

d.

12.22 m

Question number: 16

» Laws of Motion » Static and Kinetic Friction

MCQ▾

Question

Mark the correct statements:

Select the correct option:

(1) Coefficient of static friction is always greater than that of kinetic friction.

(2) Limiting friction is always greater than the kinetic friction.

(3) Limiting friction can never be less than static friction.

(4) Static friction is always greater than the kinetic friction.

Choices

Choice (4) Response

a.

(1), (2) and (3) are correct

b.

(1) and (3) are correct

c.

(2) and (4) are correct

d.

(2) and (3) are correct

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