WorksheetsTorque and rotational Dynamics
Total questions: 10
Worksheet time: 5mins
A rigid body is rotating about an axis. to stop the rotation, we have to apply........
pressure
force
momentum
torque
Two rings have their moments of inertia in the ratio 2 : 1 and their diameters are in the ratio 2 : 1. The ratio of their masses will be..........
2 : 1
1 : 2
1 : 4
1 : 1
A disc of mass 2 kg and radius 20 cm is free rotate about an axis through its centre and perpendicular to the disc. If a force of 50 N is applied tangentially to the disc, then the angular acceleration is.......
250 rad/s2
25 rad/s2
2.5 rad/s2
0.25 rad/s2
For the uniform circular motion of a body, the direction of the centripetal force of a body.........
depends on the mass of the body
depends on the linear speed of the body
depends on the sense of rotation(clockwise or anticlockwise) of the body
does not depend on the sense of rotation(clockwise or anticlockwise) of the body
A cyclist moving at a speed of 20 m/s takes a turn. If he doubles his speed, then the chance of overturn........
is halved
is doubled
becomes 4 times
becomes 1/4 times
A stone of mass 16 kg is attached to a string 144 m long and is whirled in a horizontal circle. The maximum tension the string can withstand is 16 N. Then the maximum speed that can be given to the stone without breaking the string is.........
12 m/s
14 m/s
16 m/s
20 m/s
A circular disc rotates about an axis passing through its centre with a certain angular velocity. Suddenly a small piece of the disc breaks from the edge and falls down. Then ........
its M.I. will increase and the angular velocity will decrease
its M.I. will decrease and the angular velocity will increase
both, the M.I. and the angular velocity will increase
both, the M.I. and the angular velocity will decrease
The moment of inertia of a body does not depend on ......
the mass of the body
the angular velocity of the body
the axis of rotation of the body
the distribution of the mass of the body
The shaft of a motor rotates at a constant angular velocity of 3000 rpm. In 1 second its angular displacement in radian is .....
1000π
100π
10π
π
A body of M.I. 5 kg-m2 rotating with an angular velocity of 6 rad/s has the same kinetic energy as a mass of 20 kg moving with a velocity of ........
12m/s
9 m/s
6 m/s
3 m/s
