Question

what is zero work!????????☺

Answer 1

heya buddy!!!
__________

zero work is related to the work in which the force applied with an displacement is in normal to each other.

now,
we know that
w=f cos theta.
w=f×0
=0

Answer 2

$\huge \text{Zero\: Work }$

❁ consider the relation , W = F d cos theta

❁ if theta = 90degree ,d = 0 then W = 0

❁ Work done is zero when the force and displacement are perpendicular to each other .

$\huge \text{EXAMPLES }$

❁ The work done by the Coolie in carrying a suitcase on horizontal smooth surface is zero. since the applied force and displacement are perpendicular to each other ( Ideal case).

❁ The work done by the centripetal force on the rotating body is zero. Since at each instant the centripetal force and displacement are perpendicular to each other .

❁ The tension(force) in the string of a simple pendulum is always perpendicular to displacement .So, work done by the tension is zero