Physics questions
20027 published questions with worked solutions.
- Statement 1: A disc rolls without slipping on a horizontal surface and the linear speed of its centre of mass is v. The...
- A raw egg and a hard boiled egg are made to spin on a table with the same angular speed about the same axis. The ratio of the...
- The diameter of a flywheel is increased by 1% keeping the mass same. Increase in its moment of inertia about the central axis is
- The moment of inertia of a thin uniform ring of mass 1 kg about an axis passing through the centre and perpendicular to the plane...
- The moment of inertia of the body an axis is 1.2 kg ,m^2 . Initially the body is at rest. In order to produce a rotational...
- The angular velocity of a body rotating about a given axis is doubled. Its kinetic energy
- The radius of gyration of a thin rod of mass 100 gm and length 1 m about an axis passing through its centre of gravity and...
- Radius of gyration of a uniform solid sphere about its diameter is
- The angular speed of a body changes from _1 to _2 without applying a torque due to change in moment of inertia. The ratio of the...
- Four particles each of mass (M) are held rigidly by a very light circular frame of radius b. The radius of gyration of the system...
- The radius of gyration of a flywheel is ( 3 ) m and its mass is 1 kg. The speed of the flywheel is changed from 20 r.p.m. to 60...
- Due to a certain redistribution of masses, the moment of inertia of a rotating body about the axis of rotation increases by 50%....
- A solid sphere of mass 2 kg and radius 5 cm is rotating at the rate of 300 r.p.m. The torque required to stop it with 2 rad/s in...
- Torque is a
- A stone of mass 'm' tied to a string of length l is rotating along a circular path with constant speed v. The torque on the stone...
- An automobile engine develops 100 k W when rotating at a speed of 1800 rev/min. The torque delivered by the engine is
- A wheel of M.I. of 5 10^ -3 kg ,m^2 is making 20 rev/s. The torque required to stop it in 10 s is
- A wheel having a rotational inertia of 0.16 kg ,m^2 rotates at 240 r.p.m. about a vertical axis. The angular speed of the wheel,...
- Two identical cylinders are released from the top of two identical inclined planes. If one rolls without slipping and the other...
- An inclined plane makes an angle of 30^ with the horizontal. A solid sphere rolling down this inclined plane from rest without...