An object resting on a floor is dragged, it is displaced in the direction of force applied. What
is the force that causes negative work, when it is dragged through the floor?
Answers
Answer:
Gravity does negative work here because gravity goes in the opposite direction as the displacement.
The force that causes negative work when an object is dragged along the direction of force is Frictional force.
Explanation:
In the given question, we are asked to find out what force will cause the negative work when an object is dragged through the floor.
To answer this question, let us first understand what do we mean by negative work.
Negative work: It is the work when force and displacement act in opposite directions. For reference, an attached image is given in which both types of forces and displacement has been shown.
In this case, when the object at rest is dragged on the floor, the surface of object comes in contact with the surface of floor. Due to this, frictional force comes into play.
Frictional force is the force due to the relative motion between two surfaces. It is the force that resists the motion of the object.
Coming back to the question,
If the object resting on the floor experiences a force in x direction, then frictional force will resist this motion by applying force in -x direction i.e. Frictional force will cause negative work done.
Hence the answer to the question is that Frictional force will cause negative work when object is dragged through the floor.
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