Download The First Two Laws of Motion

Name: ____________________
Science of the Physical World 234
Chapter 4, Section One Note Outline
The First Two Laws of Motion
Chapter 4, Section 1
(Pages 98-103)
Newton’s Laws of Motion
British scientist ________________________ published three rules in ____________
Rules explained how ______________ and ______________ are related
Born in ______________; died in ____________
First Law of Motion
“The __________________ acting on an object is ___________, the
object remains at ___________, or if the object is moving, it continues
moving in a straight line with _______________ speed.”
Example: a skateboard is at _____________, the skateboard doesn’t move until you
give it a _____________
______________ of the skateboard ___________ while you push it
Forces are _______________
After skateboard leaves your hand, what happens?
It ______________ and _______________
What caused the skateboard to stop?
______________ Force - ______________ Friction
Inertia & Mass
Inertia:
________________________________________________________________________
Example: dirt bike going around a curve tries to move with a ______________ velocity
Inertia depends on an object’s ___________
__________________ the mass of an object, the _______________ the inertia
Which would be harder to stop: bowling ball or a volleyball?
_____________________ because it has more _____________
You have to exert a greater ________________ to get the bowling ball to stop
Bowling ball has more _____________ because it has more ______________
Inertia & First Law of Motion
Name: ____________________
Science of the Physical World 234
Chapter 4, Section One Note Outline
If you observe a change in an object’s __________________, you know an
__________________ force is acting on it
Inertia - an object resists a change in motion
First Law of Motion is known as the Law of _______________
Ex: Boxes are stacked on top of a cart and you are pushing the cart down a hallway
quickly; you suddenly stop, what happens to the boxes?
Boxes ____________________________________________________________
Car Crashes
A car is traveling at a speed of 50 km/h and collides head on with something solid
Car crumples, slows down, and stops within about 0.1 seconds
Anybody not wearing a safety belt will continue to __________________________
Within 0.02 seconds unbelted passengers will
____________________________________
The Second Law of Motion
What’s different about throwing a ball horizontally as hard as you can and tossing it
gently?
The hard-thrown ball has a greater change in ________________ and occurs in a
________________ period of time - greater ______________________
If you throw a baseball and a softball with the same amount of force, why does the
baseball move faster?
A softball has more _____________ than a baseball
Acceleration depends on _______________ as well net _____________ exerted on it
“The ______________ of an object is in the same _____________ as
the net _____________ on the object”
Acceleration (m/s2) =