Twisted Forces Beth Kappus Frank Gulla MathScience Innovation Center
Dec 13, 2015
Newton’s 3 Laws
• Sir Isaac Newton• Late 1600’s England• Legend of Apple• Invented Calculus• Prism and Light• Universal Law of Gravity
Phot from http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Newton.html
1st Law: Law of Inertia
• A body at rest will remain at rest• And• A body in motion will remain in
motion• Unless…
1st Law: Law of Inertia
• A body at rest will remain at rest• And• A body in motion will remain in
motion• Unless…• Acted upon by an outside force
2nd Law: Law of Acceleration
• An object in motion, • when acted upon by an external
force will . . . • accelerate.
Remember: acceleration is change in speed
If a ball is rolling along the ground and you kick it . . .
3rd Law: Law of Reaction
•Forces always
•Come in pairs
•Equal in size
•Opposite in direction
•Acting on 2 different bodies