Question

example when work done on object is negative​

Answer 1

Explanation:

A person walking down the stairs with load on its head,

the work done is negative as the force applied on the load is in opposite direction to its displacement

Answer 2

Negative work is performed if the displacement is opposite to the direction of the Force applied.

$\huge\fbox\pink{Example}$

Work was done the gravity on a rocket going perpendicular upwards. Zero work: When force and displacement are perpendicular to each other, or when force or displacement is zero.