Physics- Khan Academy

Displacement

(Initial Velocity+(Acceleration×Change in Time/2))Change in Time

Gravity

-9.8 m/sec²

Scalar

has magnitude/size

Vector

has magnitude/size and direction.

Acceleration definition

the change in velocity over time

Velocity definition

the speed of something in a given direction

Unit Vectors

allow us to keep track of the components of the vector

Acceleration

Change in Velocity/Change in Time

Velocity

Displacement/Change in Time (vector qualities)

Rate/Speed

Distance/Change in Time (scalar qualities)

Newton's First Law

Every body persists in its state of being at rest or of moving uniformly straight forward, except in so far as it is compelled to change its state by force impressed.

Newton's Second Law of Motion

Force=Mass×Acceleration

Final Velocity

Initial Velocity+ Acceleration×Change in Time

Average Velocity

Initial Velocity+Final Velocity/2

Force

Mass×Acceleration

1600s

Objects have a tendency to maintain velocity unless acted on my unbalanced forces.

2000+ years

Objects have a tendency to stop. If you want something to keep moving, apply force.

Newton's Third Law of Motion

To every action there is always an equal and opposite reaction: or the forces of two bodies on each other are always equal and are directed in opposite direction.