Physics questions
20027 published questions with worked solutions.
- The moment of inertia of a flywheel having kinetic energy 360 J and angular speed of 20 rad ,s^ -1 is
- Four similar point masses (m each) are symmetrically placed on the circumference of a disc of mass M and radius R. Moment of...
- One quarter of the disc of mass m is removed. If r be the radius of the disc, the new moment of inertia is
- The radius of gyration of a uniform rod of length L about an axis passing through its centre of mass and perpendicular to its...
- Radius of gyration of disc of mass 50 g and radius 2.5 cm about an axis passing through its centre of gravity and perpendicular...
- The radius of gyration of a rod of length L and mass M about an axis perpendicular to its length and passing through a point at a...
- The moment of inertia about an axis of a body which is rotating with angular velocity 1 rad ,s^ -1 is numerically equal to
- Two thin uniform circular rings each of radius 10 cm and mass 0.1 kg are arranged such that they have a common centre and their...
- Three identical thin rods each of length l and mass M are joined together to form a ladder H. What is the moment of inertia of...
- Of the two eggs which have identical sizes, shapes and weights, one is raw and other is boiled. The ratio between the moment of...
- Moment of inertia of a solid cylinder of length L and diameter D about an axis passing through its centre of gravity and...
- Four spheres of diameter 2a and mass M are placed with their centres on the four corners of a square of side b. Then, the moment...
- Three point masses, each of mass m are placed at the corners of an equilateral triangle of side l. Moment of inertia of this...
- The diameter of a flywheel is increased by 1%. Increase in its moment of inertia about the central axis is
- An iron rod of mass M and length L is cut into n equal parts by cutting it perpendicular to its length. If I is the moment of...
- Two discs one of density 7200 kg/m^3 and another of density 9000 kg/m^3 have the same mass and thickness. What is the ratio of...
- A thin rod of length L and mass M is bent at its mid-point into two halves, so that the angle between them is 90^ . What is the...
- Moment of inertia of a thin rod of mass M and length L about an axis passing through its centre is ML^2 12 . Its moment of...
- Two wheels A and B are mounted on the same axle. Moment of inertia of A is 6 kg ,m^2 and it is rotating at 600 rpm when B is at...
- What is the torque of the force F=(2 i-3 j+4 k) N acting at the point r=(3 i+2 j+3 k) m about the origin?