- Affect speed (speed up or slow down)
- Make things change direction
- Make an object change it's shape
Force- a strength or energy as an attribute of physical action or movement
Measured in Newtons (N)
A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. When theinteraction ceases, the two objects no longer experience the force. Forces only exist as a result of an interaction.
Contact and Non Contact forces
Contact- a force that acts on a point of contact between two objects
- Frictional force
- Tension force
- Air resistance force
- Applied force
Non-contact- A force exerted on another object that is not in contact.
- Gravitational force
- Magnetic force
- Electric force
Friction- an opposing force to a moving object.
The larger the surface area the more the friction
acceleration = change in velocity / time taken
velocity = distance travelled / time taken
momentum = mass x velocity
work done = force x distance