- .An object at rest will stay at rest until a force is acted upon it
- The friction between the paper and cup isn't enough to make the cup move though the paper was snatched from under it
- Inertia is a property that states that an objects state of motion remains the same
- An object in motion will stay in motion unless a force is acted upon it to stop it
- An object with a lot of mass will also have a lot of inertia
- Net Force is the total force being acted upon an object
- Force is a push or pull
- Force is measured in newtons, or N
- When net force equals 0, the object is at an equilibrium
- Equilibrium can occur at two different times
- When the object is at rest, and when the object is moving at a constant velocity
- When an object is at equilibrium, the forces canceled each other out
- I push 5N to the left and you push 5N to the right,
- Ex: I push 5N to the left and you push 10N to the right the net force on this object is 5N to the right
Velocity
- Speed and velocity are not the same thing
- Speed is how fast something is going at a certain rate
- Velocity is how fast something is going at a certain rate but it adds the magnitude direction
- An object can go at a consistent speed and not have a constant velocity because velocity has direction
- v=d/t
- When velocity is changing, the object is accelerating
- Arrows which are vectors can be used to show an objects direction and how big it is can show you how fast it is going
- Ex= Ike is goes 6 meters after 2 seconds. How fast is he going?
- 6m/2s= 3m/2
Acceleration
- .Acceleration= ⌂v/t
- Acceleration is the rate at which something changed velocity
- If something has a constant velocity,it cannot have an acceleration
- If something is accelerating therefore, it cannot have a constant velocity
- The units for acceleration are m/s^2
- The rate of acceleration in free fall is equal to 9.8 m/s^2
- This is gravity and it is constant
- When you are driving on the highway and you start to speed up you are accelerating
- When you are on cruise control you are not
- When given distance and time an object was in motion, we can find out the acceleration as well as the velocity
- The y axis must have distance
- The x axis must have time or time^2
- If the time is 3 then time^2 equals 3*3=9
- When acceleration is constant
- The graph with time will be exponential
- The graph with time squared will be linear
- This slope will be equal to the 1a/2 in d=(1a/2)t^2
- When velocity is constant
- The line will be linear
- The slope is equal to the velocity
- This is because v=d/t
- When you use a scatter plot for your data, you must make a best fit line
- It should be the median with all of your points and can give you a solid idea of where the line may be in later point
- The slope of the best fit line also tells you the correlation of your plot based on its sign
