Friction and Circular Motion

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A wooden block is at rest on a horizontal steel surface. If a 10.-Newton force applied parallel to the surface is required to set the block in motion, how much force is required to keep the block moving at constant velocity?

While the object is undergoing uniform circular motion, its acceleration

A 50.-Newton horizontal force is needed to keep an object weighing 500. Newtons moving at a constant velocity of 2.0 meters per second across a horizontal surface. The magnitude of the frictional force acting on the object is

Compared to the force needed to start sliding a crate across a rough level floor, the force needed to keep it sliding once it is moving is

An object travels in a circular orbit. If the speed of the object is doubled, its centripetal acceleration will be

When a 12N horizontal force is applied to a box on a horizontal tabletop, the box remains at rest. The force of static friction acting on the box is

If the mass of the cart was doubled, the magnitude of the centripetal acceleration of the cart would be

In order to keep an object weighing 20 Newtons moving at constant speed along a horizontal surface, a force of 10 Newtons is required. The force of friction between the surface and the object is