chapter f1
by ashley lim
1. what is a force?
1.1. push or pull
1.2. can be measured by spring balance
2. the effects of a force
2.1. change in colour
2.2. change in shape
2.3. change in size
3. Pressure is the force per unit area applied in a direction perpendicular to the surface of an object.
4. we increase pressure by reducing area, reduce pressure by increasing area
5. Pressure = force/unit area
6. important forces
6.1. gravitational force
6.2. frictional force
6.3. magnetic force
