# JEE Main Physics Quiz: Laws Of Motion Set 2!

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| By Tanmay Shankar
T
Tanmay Shankar
Community Contributor
Quizzes Created: 491 | Total Attempts: 1,797,843
Questions: 10 | Attempts: 115

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.

• 1.

• A.

1.8 N

• B.

0.49 N

• C.

2.45 N

• D.

1.96 N

D. 1.96 N
• 2.

### During the motion of the bicycle, a force of friction is exerted by the ground on the two wheels of the bicycle. Which of the following statement is true in this context?

• A.

Frictional force for the wheels of bicycle will depend on the motion of the wheels

• B.

Frictional force will depend on the surface and the weight of bicycle and the person sitting on it

• C.

Frictional force will act in the direction of the motion

• D.

None of these

B. Frictional force will depend on the surface and the weight of bicycle and the person sitting on it
Explanation
The frictional force exerted by the ground on the two wheels of the bicycle depends on the surface and the weight of the bicycle and the person sitting on it. The type of surface and the weight of the bicycle and the person affect the amount of friction between the wheels and the ground. The frictional force does not depend on the motion of the wheels or act in the direction of the motion.

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• 3.

### An ant is slowly crawling up a hemispherical surface with negligible speed. The coefficient of friction between the ant and the surface is 2/3. If the line joining the ant and the center of the hemispherical surface subtends an angle ‘θ’ with vertical, then which of the following is true?

• A.

Cot θ = 1.5

• B.

Tan θ = 1.5

• C.

Sec θ = 1.5

• D.

Cosec θ = 1.5

A. Cot θ = 1.5
• 4.

D.
• 5.

• A.

10 N

• B.

40 N

• C.

20 N

• D.

15 N

A. 10 N
• 6.

• A.

175 N

• B.

90 N

• C.

160 N

• D.

150 N

D. 150 N
• 7.

C.
• 8.

• A.

0.1

• B.

0.5

• C.

0.2

• D.

2

B. 0.5
• 9.

### Which of the following statement is wrong about the friction?

• A.

The formula f = μN tells us that the f and N are comparable as they are having these two quantities have the same direction

• B.

Friction force can be zero, even though the surfaces in contact are rough

• C.

If there is no relative motion between the two surfaces still there might be a friction force between the surfaces

• D.

None of these

A. The formula f = μN tells us that the f and N are comparable as they are having these two quantities have the same direction
Explanation
Comparison of two physical quantities is not done on the basis of the direction of the quantities.

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• 10.

### Two blocks A and B of different masses have velocities VA and VB respectively. A horizontal force F is acting on the block A. Coefficient of friction between A & B is μ and that of between B & ground is zero. If VA = VB then which among the following statement is correct?

• A.

Friction on A supports its motion

• B.

Friction on B supports its motion

• C.

Both a & b

• D.

None of these

A. Friction on A supports its motion

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• Current Version
• Mar 21, 2023
Quiz Edited by
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• Aug 12, 2014
Quiz Created by
Tanmay Shankar

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