Physics questions
20027 published questions with worked solutions.
- The moment of inertia of a hollow cylinder of mass M, length 2R and radius R about an axis passing through the centre of mass and...
- A disc rotates horizontally at the rate of 100 r.p.m. Moment of inertia of the disc about the axis of rotation is 1 kg-m^2. A...
- Two discs of moments of inertia I_1 and I_2 about their respective axes, rotating with angular frequencies _1 and _2...
- A wheel is rotating freely at an angular speed of 800 rev/min on a shaft whose rotational inertia is negligible. A second wheel...
- A disc of uniform thickness and radius 50 cm is made of two zones. The central zone of radius 20.0 cm is made of metal and has a...
- A ball of radius 10 cm and mass 8 kg rolls down a ramp of length 3.5 m from rest. The ramp is inclined at 30° to the horizontal....
- If the earth were to suddenly contract to 1/n^ th of its present radius without any change in its mass, the duration of the new...
- A dancer is standing on a stool rotating about the vertical axis passing through its centre. She pulls her arms towards the body...
- A pot-maker rotates pot-making wheel of radius 3 m by applying a force of 200 N tangentially, because of this, the wheel...
- A ring and a disc of different masses are rotating with the same kinetic energy. If we apply a retarding torque on the ring and...
- If the radius of the earth contracts to half of its present value keeping mass constant, then the length of the day will be
- Kinetic energy of rotation E and angular momentum L are related as
- A mass is whirled in a circular path with a constant angular velocity and its angular momentum is L. If the string is now halved...
- Calculate the angular momentum of the earth due to rotation about its own axis. Assume that the earth is a sphere of mass 6 10^...
- A uniform disc of radius 'a' and mass 'm' is rotating freely with angular speed ' ' in a horizontal plane about a smooth fixed...
- If the angular momentum of a body increases by 50%, then its kinetic energy of rotation increases by (M.I. remains constant)
- A stone of mass 1 kg is rotated in a horizontal circle of radius 0.5 m. If it makes 100 r. p. s., then its angular momentum is
- Statement 1: A solid cylinder of mass m and radius r rolls down an inclined plane of height H. The rotational kinetic energy of...
- Tow disc having same mass rotate about the same axes. If _1 and _2 be the densities of two bodies ( _1 > _2), then what is the...
- M.I. of a body depend upon [MH-CET 2002]