Physics questions
20027 published questions with worked solutions.
- A thin rod of mass m and length 2l is made to rotate about an axis passing through its centre and perpendicular to it. If its...
- If r denotes the distance between the sun and the earth, then the angular momentum of the earth around the sun is proportional to
- A ballet dancer spins with 2.8 rps with her arms out stretched. When the moment of inertia about the same axis becomes 0.7I, the...
- A particle is projected with a speed v at 45^ with the horizontal. The magnitude of angular momentum of the projectile about the...
- The angular momentum of a rotating body changes from A_0 to 4A_0 in 4 min. The torque acting on the body is
- What torque will increase angular velocity of a solid disc of mass 16 kg and diameter 1 m from zero to 2 rps in 8 s ?
- A particle performs uniform circular motion with an angular momentum L. If the frequency of a particle's motion is doubled and...
- An ice skater spins at 3 rad ,s^ -1 with her arms extended. If her moment of inertia with arms folded is 75% of that with arms...
- A wheel having moment of inertia 2 kg ,m^2 about its vertical axis, rotates at the rate of 60 rpm about this axis. The torque...
- A ring of diameter 0.4 m and of mass 10 kg is rotating about its axis at the rate of 1200 rpm. The angular momentum of the ring is
- A solid sphere is rotating about a diameter at an angular velocity . If it cools, so that its radius reduces to 1/n of its...
- A 3 kg particle moves with constant speed of 2 m ,s^ -1 in the XY-plane in the y-direction along the line x=4 m. The angular...
- A disc of mass 2 kg and radius 0.2 m is rotating with angular velocity 30 rad ,s^ -1 . What is angular velocity, if a mass of...
- In a circular motion, the angle between a particle's linear momentum and its angular momentum is
- A disc of moment of inertia I_1 is rotating with angular velocity _1 about an axis perpendicular to its plane and passing through...
- A wheel rotating with a certain angular velocity is stopped in 5 s and before it stops, it makes 20 revolutions. Then initially,...
- A body starts rotating from rest and completes 100 revolutions in 20 s. Find its angular acceleration
- A cyclist is riding with a speed of 27 km ,h^ -1 . As he approaches a circular turn on the road of radius 80 m, he applies brakes...
- A particle is moving in a circle of radius R in such a way that at any instant the normal and tangential components of its...
- Match the following columns and mark the correct option from the codes given below. Column I (Translational motion) | Column II...