Physics -Forces
- Created by: Book_worm205
- Created on: 16-03-19 12:05
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- Forces
- Contact and Non-contact forces
- Scalar quantities only have magnitude and no direction.
- Examples are: speed; distance; mass; temperature; time ect.
- Vectors have magnitude and direction.
- Examples are: force; velocity; displacement; acceleration; momentum ect,
- Forces are either contact or non-contact forces.
- Contact forces are when two objects have to be touching for a force to act.
- Non-contact forces are when the objects don't need to be touching for the force to act.
- When two objects interact, there is a force produced on both objects. An interaction pair is a force that is equal and opposite and acts on two interacting object.
- Scalar quantities only have magnitude and no direction.
- Resultant forces and Work Done
- A resultant force is the overall force on a point or object.
- Work Done = Force x Distance moved along the line of action of the force
- When a force moves an object through a distance, energy is transferred and work is done on the object.
- W(J) = F(N)s(m)
- Forces and Elasticity
- Stretching; compressing or bending transfers energy
- Extension is directly proportional to force unless the force is great enough.
- F=ke
- Contact and Non-contact forces
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