Question

distinguish between positive negative and zero work

Answer 1

#Work done is said to be positive if direction of force is along the direction of displacement .
#work done is said to be negative if direction of force is opposite to the direction of displacement .
#work done is zero if the angle between force and displacement is 90 degree .

Answer 2

when an object done work in the direction of the object then it is positive work and opposite to direction is negative and perpendicular to the object is zero