A body is moving at constant speed over a frictionless surface. What is the work done by the weight?

If a body is moving with constant speed, then its acceleration

If a body moves with a constant speed in a circle

When a body moves with a constant speed along a circle

What is work done when a body is moving at constant speed over a frictionless horizontal surface ?

A body mass 4kg initiallay at rest is moved by a horizntally force 1N on a frictionless table. Find the work done by the force in 4s. Show that this equals the change in K.E. of the body.

(a) What happens to the work done when the displacement of a body is at right angles to the direction of force acting on it ? Explain your answer. (b) A force of 50 N acts on a body and moves it a distance of 4 m on a horizontal surface. Calculate the work done if the direction of force is at an angle of 60^(@) to the horizontal surface.

A body of mass m is moving in a circle of radius r with a constant speed v, The force on the body is (mv^(2))/(r ) and is directed towards the centre. What is the work done by the force in moving the body over half the circumference of the circle?