MEDIUM
NEET
IMPORTANT
Earn 100
Assertion: Angular momentum may not necessarily be parallel to the angular velocity vector.
Reason: The body may not be symmetrical about its axis of rotation.
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Important Questions on Rotational Mechanics
HARD
NEET
IMPORTANT
Assertion: As star collapse its angular velocity increases.
Reason: The mass of the star decreases.
MEDIUM
NEET
IMPORTANT
Assertion: A sharp needle when balanced on an edge falls even under a small disturbance.
Reason: Small disturbance causes torque in the same direction as that of angular displacement.
MEDIUM
NEET
IMPORTANT
Assertion: A rotating body can be in stable and unstable equilibrium.
Reason: Moment of inertia is always different for the different axis of rotation.
MEDIUM
NEET
IMPORTANT
Assertion: Practically a body rolling on a surface will lose its complete .
Reason: Friction will convert its into of atoms.
MEDIUM
NEET
IMPORTANT
Assertion: Spin angular momentum is an intrinsic property of the body.
Reason: It doesn’t depend on the coordinates of the body.
EASY
NEET
IMPORTANT
Assertion : Angular momentum of a satellite remains conserved.
Reason : Conservation of linear momentum leads to conservation of angular momentum.
MEDIUM
NEET
IMPORTANT
Assertion : If a unit north pole rotates around a current carrying wire then work has to be done.
Reason : Magnetic field produced by current is always non-conservative in nature.
MEDIUM
NEET
IMPORTANT
Assertion: Torque on a body can be zero even if there is a net force on it.
Reason: Torque and force on a body are always perpendicular.
