Forces, Friction, and Free Body Diagram Study Guide

What are the two types of forces

Contact and Natural

What are the 6 contact forces

Normal, Friction, Spring, Tension, Applied, Air Resistance

What are the 3 natural forces

Electric, Magnetic, Gravity

What is “net force”

Combined forces acting on an object

What does not affect the force of friction

Surface Area

What are the three types of friction

Static, Sliding, and Rolling

This type of friction opposed the motion of two surfaces sliding past each other

Sliding Friction

What is a force that prevents objects from passing through each other

Normal Force

What does Fa do? (Applied Force)

Any external force applied to the object by a person, engine, etc- A push

What does Ff do? (Frictional Force)

Force that opposes motion or attempted motion between two surfaces in contact- A car stopping

What does Ft do? (Tension Force)

Force transmitted through a rope, string, cable, or wire when it is pulled tight- Tugawar

What does Fair do? (Air Resistance)

A type of friction acting opposite to motion through the air (often small unless object is moving fast)- Skydiving

What does Fs do? (Spring Force)

Force exerted by a compressed or stretched spring

What does Fn do? (Normal Force)

The support force a surface up on an object to hold it up- A table

What is the unit for force?

A newton