Significance of Rotational Motion
A flywheel has a mass of 25kg has a radius of 0.2m. What force should be applied tangentially to the rim of the flywheel so that it acquires an angular acceleration of 2rad/s2?
2N
5N
3N
1N
A torque of 10Nm is applied to a flywheel of mass 1kg and radius of gyration 50cm. What is the resulting angular acceleration?
4 rad/s2
2 rad/s2
5 rad/s2
6 rad/s2
The angular velocity of a planet revolving in an elliptical orbit around the sun increases, when it comes closer to the sun. This is due to ______________
Conservation of momentum
Newton’s second law of motion
Conservation of angular momentum
Law of angular velocity
In a hand driven grinding machine, the handle is put _____________
Perpendicular to the stone
Near the circumference of the stone
A few distances above the stone
As far away from the stone
A faulty balance with unequal arms has its beam horizontal. The weights of the two pans are _____________
Equal
Unequal
Uncertain
Very large
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