Forces & Pressure
by YONG WENYU VALERIE .
1. Calculating pressure
1.1. Force /Area
2. Increasing and decreasing pressure
2.1. Increase: Increase the surface area in contact
2.2. Decrease: Decrease the surface area in contact
3. Force
3.1. A force is a push or a pull and are all around us. Everything we do needs a force.A force cannot be seen but the effect can be felt.
4. Effects of Force
4.1. Changes the speed of a moving object
4.2. Starts a stationary object or stop a moving object
4.3. Change the shape or size of an object
4.4. Change the direction of a moving object
5. How to measure force
5.1. Force meters
5.1.1. Extension spring balance
5.1.2. Compression spring balance