# PHYSICS: ROTATIONAL MOTION Online Test

A symmetrical body rotating about its axis of symmetry has moment of inertia 1 kg –m2 and rate of rotation is 8 rev/sec. The kinetic energy of rotation will be
Consider a uniform solid cylinder of radius 0.01m and mass 100 kg wrapped several times with a rope. Pivoted so it can rotate about its axis. The angular acceleration when the rope is pulled with a force of 50 N, is
8 red s-2
16 red s-2
40 red s-2
100 red s-2
The acceleration of a ring with its M.I. lying about the axis passing through its center and perpendicular to its plane (axis of rotation) rolling down an inclined plane at an angle is
The path of the center of mass of an Indian club (Mugdar) always follows the ________ when thrown vertically upwards.
Hyperbolic path
Parabolic path
Circular path
Zig-zag path
When the resultant external torque on a system is zero, the angular momentum of the system
Decreases
Increases
Remains constant
None of the above
A skater, performing a performing a pirouette on the toe of one skate, takes the advantage of
Conservation of momentum
Conservation of angular momentum
Energy conservation
Conservation of kinetic energy
In pure rotation, the center of mass of the rotating body has
Linear velocity
Non-uniform velocity
Zero linear velocity
Maximum velocity
If a cracker explodes in mid air into many fiery pieces, the center of mass of all the fragments of the cracker continuously moves along the
Parabolic path in initial direction
Hyperbolic path
Different path
Parabolic but not in initial direction
A rotating thin wheel can stay upright on its rim for a long time, however, when a thin wheel is stationary, it falls from its vertical position on a small disturbance, because the wheel is in
Non-vertical equilibrium
Stable equilibrium
Unstable equilibrium
None of the above
When a spin is given at the same time to both a hard boiled egg and a raw egg, the torque applied in both the cases is the same, then the angular acceleration of
Hard egg will be less
Both the egg will be the same
Raw egg will be less
Raw egg will be zero
Description:

Questions are on motion of centre of mass, conservation of angular momentum mainly

Discussion

gud tst.due to carelsns got 8.....................

3770 days 15 hours 36 minutes ago

thanx for all great effors and i like to contact with u more and more to know more of ur great exams
mnoor124@hotmail.com
am teacher of physics too we can cooporate more
waiting to read from u
regards

4088 days 12 hours 22 minutes ago

Kajal Sengupta
Physics 9th to 12 th grade,CIE, Edexcel, AP, IB , CBSE, ICSE
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