- Created by: Davwi
- Created on: 19-02-19 05:22
Free body diagrams
- The sizes of the arrows show the magnitude of the force.
- The directions show the direction of the force.
- A free body diagram only incorporates forces exerted on an object and not the force the object exerts to its surroundings.
- Here is an example:
- In this example you can see the different amounts of gravity and air resistance that contribute to a drop.
- In most real situations, there are at least 2 forces acting on an object.
- If you have a certain number of forces acting on a single object, you can replace them with a single force, so long as this single force as the same effect as all the forces added together.
- This is called the resultant force.
- If the forces all act in the same direction, then you add them to get your resultant force, and subtract any going in the opposite direction.
- When a force moves through a distance, energy is transferred, therefore work is done.
- To make something move, or keep it moving in the case of frictional forces, a force must be applied.
- The thing applying the force needs a source of energy.
- The force does work to move the object and energy is transferred from one store to…