newton’s 1 st law inertia an object at rest will stay at rest, and an object in motion will stay...
TRANSCRIPT
![Page 1: Newton’s 1 st Law Inertia An object at rest will stay at rest, and an object in motion will stay in motion at constant velocity unless acted on by an unbalanced](https://reader035.vdocuments.us/reader035/viewer/2022081908/56649ea75503460f94ba995f/html5/thumbnails/1.jpg)
Newton’s 1st LawInertia
An object at rest will stay at rest, and an object in motion will stay in motion at constant velocity unless acted on by an unbalanced force.
Think Seat Belts!! If you are NOT wearing your seatbelt and you get hit from behind, your body will propel forward hitting the windshield.
![Page 2: Newton’s 1 st Law Inertia An object at rest will stay at rest, and an object in motion will stay in motion at constant velocity unless acted on by an unbalanced](https://reader035.vdocuments.us/reader035/viewer/2022081908/56649ea75503460f94ba995f/html5/thumbnails/2.jpg)
Newton’s 2nd LawFnet = ma
If an unbalanced force acts on a mass, that mass will accelerate in the direction of the force. You must have a (Δv/ t = a)
2 N 8 N
a
Since 8N is greater than 2N, the unbalanced force is to the right so the acceleration is to the right.
What is the resultant force?
![Page 3: Newton’s 1 st Law Inertia An object at rest will stay at rest, and an object in motion will stay in motion at constant velocity unless acted on by an unbalanced](https://reader035.vdocuments.us/reader035/viewer/2022081908/56649ea75503460f94ba995f/html5/thumbnails/3.jpg)
Newton’s 3rd LawAction - Reaction
For every action force there is an equal and opposite reaction force.
Example: If you punch a wall with your fist in anger, the wall hits your fist with the same force. That’s why it hurts!
Action-reaction forces cannot balance each other out because they are acting on different objects.
![Page 4: Newton’s 1 st Law Inertia An object at rest will stay at rest, and an object in motion will stay in motion at constant velocity unless acted on by an unbalanced](https://reader035.vdocuments.us/reader035/viewer/2022081908/56649ea75503460f94ba995f/html5/thumbnails/4.jpg)
Let’s get some formulas ready to use on the problems.
1. Big 5 Kinematic Equations 2. Acceleration formula 3. Force Formula 4. Weight = Fg=ma 5. Pythagorean Th. 6. Inverse Tangent(TOA)
![Page 5: Newton’s 1 st Law Inertia An object at rest will stay at rest, and an object in motion will stay in motion at constant velocity unless acted on by an unbalanced](https://reader035.vdocuments.us/reader035/viewer/2022081908/56649ea75503460f94ba995f/html5/thumbnails/5.jpg)
Acceleration on the “y” = ay
• Fg = wt = mg• use 9.8m/s2 to calculate ( mg )
• Reminder: Fg = m x g
N = kg x m/s2
![Page 6: Newton’s 1 st Law Inertia An object at rest will stay at rest, and an object in motion will stay in motion at constant velocity unless acted on by an unbalanced](https://reader035.vdocuments.us/reader035/viewer/2022081908/56649ea75503460f94ba995f/html5/thumbnails/6.jpg)
Acceleration on the “x” = ax
• d = Vi t + ½ a t2 a = 2 d t2
• Vf2 = Vi2 + 2 ad a = Vf2- Vi2
2d
0
0
![Page 7: Newton’s 1 st Law Inertia An object at rest will stay at rest, and an object in motion will stay in motion at constant velocity unless acted on by an unbalanced](https://reader035.vdocuments.us/reader035/viewer/2022081908/56649ea75503460f94ba995f/html5/thumbnails/7.jpg)
Acceleration can be solved….
Basic formula
a = Δv t