Question
When is an object said to possess energy?
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A ball weighing 4kg of density 4000kg m–3 is completely immersed in water of density 103kg m–3 Find the force of buoyancy on it. (Given g = 10ms-2)

A force of 50N acts on a body and moves it a distance of 4m on a horizontal surface. Calculate the work done if the direction of force is at an angle of 60° to the horizontal surface.