Question

Show that the work done by a force is given by the product of the force and the projection of the displacement along the force.

Answer 1

Explanation:

Let F be the force and s the displacement. Let θ be the angle between F and s. Geometrically, s cos θ is the projection of vector s along vector F. Hence Work done by a force is nothing but the product of the magnitude of foce and the projection of displacement along the force.

Answer 2

Answer:

Let F be the force and s the displacement. Let θ be the angle between F and s. Geometrically, s cos θ is the projection of vector s along vector F. Hence Work done by a force is nothing but the product of the magnitude of foce and the projection of displacement along the force.

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