Forces and Pressure.
by Alysia Tan
1. Types of Forces:
1.1. Gravitational force, magnetic force and frictional force.
1.1.1. Gravitational force is something which pulls the object down to the Earth
1.1.2. Frictional force is something which occurs when two surfaces are in contact with each others. Frictional force is something which opposes frction
1.1.2.1. Advantages: Prevent us from slipping.
1.1.2.2. Disadvantages: causes wear and tear
1.1.2.3. Ways to reduce it: Lubricants, ball bearings.
1.1.3. Magnetic force is a force that is exerted from a magent to a magnetic material
1.1.3.1. Only magnets can repel each other.