Presentation is attached below
Cliff Notes
I. Force
A. Force: a push or a pull
B. Force is measured in Newtons (N)
C. Examples: pushing a box, hitting something, pulling on a rope, pushing the gas pedal on a car
II. Free Body Diagrams
A. Free Body Diagrams: used to show all forces acting on an object
B. Examples
1. A person pushing a box (diagram)
2. Two people pushing a box (diagram)
3. Person skydiving with a parachute (diagram)
III. Net Force
A Net Force: the resulting total force acting on an object
B. Examples
1. One person pulling a box with a 15 N force to right while another pulls with a 6 N force to the left.
Net force? 9 N to the right
2. Two people pushing a box to the right with 7 N forces, one pushing to the left with a 20 N force.
Net force? 6 N to the left
3. Person skydiving with a parachute weighs 50 N, and the parachute provides 20 N of resistance.
Net force? 30 N down
Attachmments
Net Force + Equilibrium Force Worksheet - a worksheet reviewing problems from the text book on net force and equilibrium force