* Work is defined as the force applied to an object multiplied by the distance the object moves in the direction of the force.
* Force is simply a push or pull.
Examples:
* Holding a heavy weight: You exert a large upward force to counteract gravity, but the weight isn't moving, so no work is being done.
* Pushing against a wall: You push with all your might, but the wall doesn't budge. No work is done because there's no displacement.
* A stationary object in a strong gravitational field: The object experiences a large force due to gravity, but since it's not moving, no work is done.
Key takeaway: Work requires both force and movement. If an object is not moving, no matter how much force you apply, you are not doing work.
