state the expression for work done by a force when the object experiencing the force is displaced opposite to the force
Answers
Answer:
When displacement is opposite the force
Work done = -(force×displacement)
Explanation:
In certain cases the displacement of an object may be in the direction opposite to the direction of the force acting on it. If a ball is thrown up its displacement is in the upward direction where was the force due to the earth's gravity is in the downward direction. We can say that the object has moved a negative distance in the vertically downward direction.
If the force acting on an object and its displacement are in opposite directions the work done by the force on the object is
W= -Fd
Where F is the force and d is the displacement of the object.
Work is done when a force is applied, at least partially, in the direction of the displacement of the object. If that force is constant then the work done by the force is the dot product of the force with the displacement: W = F ⃗ ∙ d ⃗