1. BELLRINGER

2. To Do Attendance Talk about turnitin.com & UT Quest Show/explain HW
Period 7: put up chairs please!
Hand out Force Problem Sets
Finish free body diagrams

3. Forces Newton’s 3 Laws Vector Addition
1) Law of Inertia: objects at rest will stay at rest and objects in motion will stay in motion unless acted on by an outside force
“inertia” is NOT a force but a RESULT of an object’s mass
2) The acceleration of an object is directly proportional to the NET force acting on it
∑F net = manet
3) For every action, there is an equal an opposite reaction
Vector Addition
The resultant is the sum of the x & y components
Can solve for using Pythagorean Theorum

4. Forces Vector Addition Springs
The resultant is the sum of the x & y components
Can solve for using Pythagorean Theorem
Springs
When a spring is stretched or compressed from its unstressed length by a distance x , the law is
F = kΔx
Where K is the “spring constant”
This is unique to each spring