Question

How the work done changes when the angle at which the force act changes?

Answer 1

It states that, for a single particle, the work done on an object is equal to the change in kinetic energy. ... Just to be clear, Δr represents the displacement (how far the force pushes something) and θ represents the anglebetween the force and the direction the object moves.

Answer 2

When a force acts on an object over a distance, it is said to have done work on the object. Physically, the work done on an object is the change in kinetic energy that that object experiences. We will rigorously prove both of these claims.

The term work was introduced in 1826 by the French mathematician Gaspard-Gustave Coriolis as “weight lifted through a height,” which is based on the use of early steam engines to lift buckets of water out of flooded ore mines. The SI unit of work is the newton-meter or joule (J).

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