Work is defined as the force applied over a distance.
* Force: A push or pull on an object.
* Distance: The amount of movement the object undergoes.
Examples:
* Holding a heavy weight: You're exerting a significant upward force to counter gravity, but the weight isn't moving. Since there's no displacement, no work is being done.
* Pushing against a wall: You might exert a lot of force, but the wall doesn't budge. Again, no displacement means no work.
* Walking around with a backpack: You're carrying the backpack, exerting a force to support its weight. However, the backpack isn't moving relative to you, so no work is done in the context of the backpack's position.
Key Takeaway:
Work is only done when a force causes an object to move in the direction of the force. If there's no movement, there's no work done, even if force is being applied.
