A particle of mass m moving with velocity u makes an elastic one-dimensional collision with a stationary particle of mass m. They are in contact for a very short time T. Their force of interaction increases from zero to F0 linearly in time T/2 and decreases linearly to zero in further time T/2. The magnitude of F0 is:

(1) mu/T

(2) 2mu/T

(3) mu/2T

(4) None of these

Subtopic:  Linear Momentum |
 75%
From NCERT
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A force of 50 dynes is acted on a body of mass 5 g which acts for an interval of 3 seconds, then impulse is 

(1) 0.15 × 10–3 N-s

(2) 0.98 × 10–3 N-s

(3) 1.5 × 10–3 N-s

(4) 2.5 × 10–3 N-s

Subtopic:  Linear Momentum |
 78%
From NCERT
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In an explosion a body breaks up into two pieces of unequal masses. In this 

(1) Both parts will have numerically equal momentum

(2) Lighter part will have more momentum

(3) Heavier part will have more momentum

(4) Both parts will have equal kinetic energy

Subtopic:  Linear Momentum |
 68%
From NCERT
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Two bodies of masses m1 and m2 have equal kinetic energies. If p1 and p2 are their respective momentum, then ratio p1 : p2 is equal to 

(1) m1:m2

(2) m2:m1

(3) m1:m2

(4) m12:m22

Subtopic:  Linear Momentum |
 85%
From NCERT
PMT - 1985
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A light and a heavy body have equal momenta. Which one has greater K.E 

(1) The light body

(2) The heavy body

(3) The K.E. are equal

(4) Data is incomplete

Subtopic:  Linear Momentum |
 78%
From NCERT
PMT - 1985
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If the K.E. of a body is increased by 300%, its momentum will increase by 

(1) 100%

(2) 150%

(3) 300%

(4) 175%

Subtopic:  Linear Momentum |
 64%
From NCERT
PMT - 2002
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A light and a heavy body have equal kinetic energy. Which one has a greater momentum ? 

(1) The light body

(2) The heavy body

(3) Both have equal momentum

(4) It is not possible to say anything without additional information

Subtopic:  Linear Momentum |
 67%
From NCERT
PMT - 1997
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Two bodies with kinetic energies in the ratio of 4 : 1 are moving with equal linear momentum. The ratio of their masses is 

(1) 1 : 2

(2) 1 : 1

(3) 4 : 1

(4) 1 : 4

Subtopic:  Linear Momentum |
 74%
From NCERT
PMT - 1999
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A rope is wound around a hollow cylinder of mass 3 kg and radius 40cm. What is the angular acceleration of the cylinder,if the rope is pulled with a force of 30 N?

(1) 25m/s2

(2) 0.25 rad/s2

(3) 25 rad/s2

(4) 5 m/s2

Subtopic:  Torque |
 69%
From NCERT
NEET - 2017
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Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with angular velocities ω1  and ω2. They are brought into contact face to face coinciding the axis of rotation.  The expression for loss of energy during this process is 

1. 12Iω1+ω22

2. 14Iω1-ω22

3. Iω1-ω22

4. 18Iω1-ω22 

Subtopic:  Angular Momentum |
 71%
From NCERT
NEET - 2017
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