Newton's Laws
An object at rest tends to stay at rest, and an object in motion tends to stay in motion, unless acted upon by an unbalanced force
What is Newton's First Law?
Speed AND direction
What is velocity?
Energy having to do with motion
What is kinetic energy?
The unit we use for force.
What is Newtons?
A student placed a stuffed animal on the dashboard of a car. When the car accelerated quickly, the stuffed animal flew back into the seat.
Which principle BEST describes the motion of the stuffed animal as the car accelerated?
Inertia
Force = mass x acceleration
What is Newton's Second Law?
Draw a line (on the graph side of your board) that could represent an object moving away from the starting point.
Refer to board
Stored energy
**BONUS - what are the two types?
What is potential energy?
** Gravitational and Elastic
What is balanced forces?
What energy transformation takes place in a flashlight?
chemical --> electrical --> light AND heat
For every action force, there is a reaction force that is equal in size but opposite in direction
What is Newton's Third Law?
In a distance graph when an object is at rest.
What is a flat line?
The sum of kinetic and potential energy
What is mechanical energy?
What are forces that are working in the same direction?
*BONUS: How would you calculate the net force?
What is unbalanced forces?
**Add
What force always opposes motion?
Friction
50 N <-----O--> 20 N
The net force acting on the object.
What is 30 N left?
Using the graph on the back of your board, draw a graph that represents an object speeding up.
Refer to board
Energy due to moving electrons.
What is electrical energy?
What effect does adding force have on an object's acceleration?
The object will accelerate faster.
Where will a roller coaster have the highest amount of potential energy?
At the top of the highest hill.
Forces that are equal in size but opposite in direction are ___________.
**BONUS - What is their net force?
Balanced
Zero!
Use the graph on the back of your board and create a graph that could represent an object speeding up then coming to a stop.
Energy can neither be created nor destroyed, only transformed.
What is the Law of Conservation of Energy?
Give an example where an object will have a net force greater than zero acting on it?
Any example where there is a change in motion.
Where will two objects experience the MOST gravitational force?
When they are closer together.