Laws of Motion-Static and Kinetic Friction (KVPY Stream-SA (Class 11) Physics): Questions 3 - 5 of 5

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Question number: 3

» Laws of Motion » Static and Kinetic Friction

Appeared in Year: 2014

MCQ▾

Question

A box when dropped from a certain height reaches the ground with a speed V. When it slides from rest from the same height down a rough inclined plane inclined at an angle 45° to the horizontal, it reaches the ground with a speed V3 . The coefficient of sliding friction between the box and the plane is (acceleration due to gravity is 10 ms-2)

Choices

Choice (4) Response

a.

89

b.

23

c.

19

d.

13

Question number: 4

» 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: 5

» 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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