BACHELOR OF SCIENCE (HONS) Lecture Notes - Dot Product, Electronvolt, Inelastic Collision
23 May 2022
School
Department
Professor
Document Summary
Work:- work done w is defined as the dot product of force f and displacement s. Work done by the force is positive if the angle between force and displacement is acute (0 < <90 ) as cos is positive. This signifies, when the force and displacement are in the same direction, work done is positive. This work is said to be done upon the body. When the force acts in a direction at right angle to the direction of displacement (cos 90 = 0), no work is done (zero work). Work done by the force is negative if the angle between force and displacement is obtuse (90 < <180 ) as cos is negative. This signifies, when the force and displacement are in opposite directions, work done is negative. This work is said to be done by the body.
