1. Force
1.1. Force Is...
1.1.1. Push
1.1.2. Pull
1.1.3. Twist
1.1.4. Squeeze
1.2. Force Can...
1.2.1. Change the speed of a moving object,either by increasing its speed or slowing it down
1.2.2. Change the shape or size of an object
1.2.3. Start an object moving or stop a moving object
1.2.4. Change the direction of a moving object
1.3. Measuring Force
1.3.1. Force-meters
1.3.1.1. Extension spring balance
1.3.1.2. Compression Spring Balance
1.4. SI Unit
1.4.1. Newton
1.4.2. Symbol: N
1.5. Examples of Force
1.5.1. Frictional Force
1.5.1.1. The force produced by two moving surfaces in contact
1.5.1.2. Opposes and slows down movement
1.5.1.3. Useful in everyday life(eg. Force is needed for walking)
1.5.1.4. Can be a nuisance
1.5.1.5. Reduce friction by using smooth surfaces,ball bearings,lubricants and by streamlining
1.5.2. Magnetic Force
1.5.2.1. The force of attraction produced by magnets on objects made of iron or steel
1.5.2.2. Can also attract or repel magnets
1.5.3. Gravitational Force
1.5.3.1. Is a force that pulls objects towards the Earth
1.5.3.2. Force of gravity pulling down on a object is called its weight
2. Pressure
2.1. Depends on
2.1.1. Force
2.1.2. Area
2.2. Effect of pressure by area
2.2.1. Increasing pressure by reducing area
2.2.2. Reducing pressure by increasing area
2.3. Calculating Pressure
2.3.1. Pressure= Force/Area
2.4. Pressure Is...
2.4.1. The force exerted per unit area