Force and Pressure
af TAN RONG TING .
1. measured using a force-meter
1.1. spring balances are force-meter
1.1.1. compression spring balance
1.1.2. extension spring balance
2. what are the important factors around us?
2.1. gravitational force
2.1.1. weight
2.1.2. pulls object towards the earth
2.2. magnetic force
2.2.1. can attract magnetic objects
2.3. frictional force
2.3.1. occurs whever 1/2 moving sufaces are in contact with each other. the moving object will slow down
2.3.2. causes wear and tear
2.3.3. makes movement more difficult