When we say work is done by a force, we mean the force does
When we say work is done by a force, it means that the force is causing the displacement of an object in the direction of the force. In other words, work is done when a force acts on an object and causes it to move. Work is a measure of the energy transferred to or from an object by means of a force acting on it.
When we say work is done by a force, we mean that the force is responsible for causing a displacement or movement of an object in the direction of the force applied.
To calculate the work done by a force, you need to know two things: the magnitude of the force and the displacement of the object in the direction of the force. The formula for work is:
Work = Force x Displacement x cosθ
Where:
- Work is the energy transferred to or from an object.
- Force is the magnitude of the force applied to the object.
- Displacement is the distance traveled by the object in the direction of the force.
- θ (theta) is the angle between the force vector and the direction of displacement.
The cosine of the angle θ is used because work is only done in the direction of the force. If the force and displacement are in the same direction, θ is 0 and cosθ is 1, resulting in maximum work done. If the force and displacement are perpendicular, θ is 90 degrees and cosθ is 0, resulting in no work done.
So, when we say work is done by a force, it means that energy is transferred to or from the object due to the force causing it to move in the direction of the force applied.