Free Body Diagrams & Net Force

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