Systems Of Particles And Rotational Motion

Physics
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A particle is moving along a fixed circular orbit with uniform speed. Then the correct statement among the following is:

A
Angular momentum of particle is constant only in magnitude but its direction changes from point to point
B
Angular momentum of particle is constant only in direction but its magnitude changes from point to point
C
Angular momentum of particle is constant both in magnitude and direction
D
Angular momentum of particle is not constant both in magnitude and direction
Easy
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Which of the following has the maximum momentum?

A
A 100 kg vehicles moving at 0.02 ms.
B
A 4 g weight moving at 10,000 cms.
C
A 200 g weight moving with kinetic energy of 10.
D
A 20 g weight after falling one kilometer.
Easy
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When the velocity of a body is doubled

A
kinetic energy is doubled
B
acceleration is doubled.
C
momentum is doubled.
D
potential energy is doubled.
Easy
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Which of the following pairs of physical quantities are not analogous to each other in case of translatory motion and rotational motion, 

A
force, torque
B
mass, moment of inertia
C
couple, torque
D
linear momentum, angular momentum
Easy
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