Rotational Motion
Physics ⇒ Mechanics
Rotational Motion starts at 11 and continues till grade 12.
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See sample questions for grade 12
A child sits at the edge of a rotating merry-go-round. If she moves towards the center, what happens to the angular velocity of the system, assuming no external torque acts?
A disc of mass 2 kg and radius 0.5 m is rotating at 10 rad/s. Calculate its kinetic energy of rotation. (Take I = (1/2)MR2)
A flywheel of moment of inertia 0.2 kg·m2 is rotating at 30 rad/s. What is its angular momentum?
A gymnast pulls in her arms while spinning. What happens to her angular velocity?
A torque of 10 N·m is applied to a wheel of moment of inertia 2 kg·m2. What is its angular acceleration?
A uniform disc of mass 4 kg and radius 0.3 m is rotating at 15 rad/s. Calculate its angular momentum.
A uniform disc of radius 0.2 m rolls without slipping with an angular velocity of 10 rad/s. What is its linear velocity?
A uniform rod of length 2 m and mass 3 kg is rotated about an axis perpendicular to its length and passing through one end. Calculate its moment of inertia about this axis.
A wheel starts from rest and attains an angular velocity of 20 rad/s in 5 seconds. What is its angular acceleration?
If a body is rotating with constant angular velocity, what is its angular acceleration?
State the perpendicular axis theorem.
State the principle of conservation of angular momentum.
State the relation between linear velocity (v) and angular velocity (ω) for a point at a distance r from the axis of rotation.
The angular displacement of a rotating body in 2 seconds is 4π radians. What is its average angular velocity?
Which law states that the rate of change of angular momentum of a body is equal to the applied torque?
