Work is defined as the product of the force applied to an object and the distance the object moves in the direction of the force.
Formula: Work (W) = Force (F) x Distance (d) x cos(theta)
* Force (F): The push or pull applied.
* Distance (d): The distance the object moves.
* Theta (θ): The angle between the force and the direction of movement.
Examples:
* Holding a heavy weight: You exert a force upwards to counter gravity, but the weight doesn't move. Since there's no displacement, no work is done.
* Pushing against a wall: You push with all your might, but the wall doesn't budge. Again, no displacement means no work.
* Carrying a suitcase horizontally: You exert a force upwards to counteract gravity, but the suitcase moves only horizontally. Since the force is vertical and the displacement is horizontal (theta = 90 degrees, cos(90) = 0), no work is done.
Key takeaway: Work is about the change in an object's position due to a force. If there is no change in position, even with significant force applied, no work is done.
