29. Give one example each in which a force does (a) positive work (b) negative work, and (c) zero work
Answers
Answer:(a) positive work:Positive work: when force and displacement are in the same direction, the work performed on an object is said to be positive work. Example: When a body moves on the horizontal surface, force and displacement act in the forward path. ... Example: Work was done the gravity on a rocket going perpendicular upwards.
(b) negative work: When a body moves on the horizontal surface, force and displacement act in the forward path. ... Negative work: Negative work is performed if the displacement is opposite to the direction of the Force applied. Example: Work was done the gravity on a rocket going perpendicular upwards.
(c) zero work:When a body moves on the horizontal surface, force and displacement act in the forward path. The work is done in this case known as Positive work. ... Zero work: When force and displacement are perpendicular to each other, or when force or displacement is zero.