# NEET and AIPMT NEET Physics Systems of Particles and Rotational Motion MCQ Questions Solved

A block of mass m moving at a velocity v collides with another block of mass 2m at rest. The lighter block comes to rest after collision. Find the coefficient of restitution.

(a) $\frac{1}{2}$                                               (b) $1$

(c) $\frac{1}{3}$                                               (d) $\frac{1}{4}$

Concept Videos :-

#4 | Definition of Momentum
#5 | Conservation of Momentum
#6 | Problems

Concept Questions :-

Linear momentum

From conservation of linear momentum we can see that velocity of 2m will become $\frac{\mathrm{v}}{2}$ after collision (as mass is doubled)

Difficulty Level:

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PMT - 2011

A small mass attached to a string rotates on a frictionless table top as shown. If the tension on the string is increased by pulling the string causing the radius of the circular motion to decrease by a factor of 2, the kinetic energy of the mass will

(a) Increase by a factor of 4                                       (b) Decrease by a factor of 2

(c) Remain constant                                                   (d) Increase by a factor of 2

Concept Videos :-

#19 | Angular Momentum

Concept Questions :-

Angular momentum

Difficulty Level:

• 39%
• 28%
• 24%
• 11%
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Concept Videos :-

#10 | Moment of Inertia (MI): Introduction
#11 | MI: Discreet Particles
#12 | MI: Continuous Bodies_1
#13 | MI: Questions on Continuous Bodies
#14 | MI: Continuous Bodies_2
#15 | Theorems of Moment of Inertia
#16 | Questions on Theorems of MI
#17 | Set 1: Previous Year Problems

Concept Questions :-

Moment of inertia

Difficulty Level:

• 16%
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Concept Videos :-

#4 | Definition of Momentum
#5 | Conservation of Momentum
#6 | Problems

Concept Questions :-

Linear momentum

Difficulty Level:

• 39%
• 28%
• 17%
• 18%
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Concept Videos :-

#10 | Moment of Inertia (MI): Introduction
#11 | MI: Discreet Particles
#12 | MI: Continuous Bodies_1
#13 | MI: Questions on Continuous Bodies
#14 | MI: Continuous Bodies_2
#15 | Theorems of Moment of Inertia
#16 | Questions on Theorems of MI
#17 | Set 1: Previous Year Problems

Concept Questions :-

Moment of inertia

Difficulty Level:

• 18%
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Concept Videos :-

#10 | Moment of Inertia (MI): Introduction
#11 | MI: Discreet Particles
#12 | MI: Continuous Bodies_1
#13 | MI: Questions on Continuous Bodies
#14 | MI: Continuous Bodies_2
#15 | Theorems of Moment of Inertia
#16 | Questions on Theorems of MI
#17 | Set 1: Previous Year Problems

Concept Questions :-

Moment of inertia

Difficulty Level:

• 9%
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• 66%
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PMT - 1997

Difficulty Level:

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A particle of mass 1 kg is kept at (1m, 1m, 1m). The moment of inertia of this particle about z-axis would be

1.

2.

3.

4.  None of these

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Difficulty Level:

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Difficulty Level:

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