A girl finds herself stuck with her back to the wall of a cylinder rotating about its axis. Which diagram correctly shows the forces acting on her?

A cylinder of water, is rotating about its own axis with uniform angular velocity ω. The shape of free surface of water will be

The diagram shows a rough plank resting on a cylinder with one and of the plank on rough ground. Negtect friction between plank and cylinder. Draw digrams to show (a) the force acting on the plank, (b)the force acting on the cylinder.

The diagram shows a rough plank resting on a cylinder with one and of the plank on rough ground. Negtect friction between plank and cylinder. Draw digrams to show (a) the force acting on the plank, (b)the force acting on the cylinder.

A spring is compressed against a rigid wall. Draw a neat and labeled diagram showing the forces acting on the spring.

Which forces needed for the rotational motion about a fixed axis?

A cylinder full of water is rotating about its own axis with uniform angular velocity omega . Then the shape of free surface of water will be

Show on a diagram the vector that would represent the angular velocity of the earth rotating about its axis.

Equal torques are applied on a cylinder and a hollow sphere. Both have same mass and radius. The cylinder rotates about its axis and the sphere rotates about one of its diameters. Which will acquire greater speed ? Explain.