










SOH CAH TOA
 Sin (θ)= O/H
 Cos (θ)= A/H
 Tan (θ)= O/A


Joules derivationusing work formula
 W=F*d
 J=N*m
 J=(Kg*m/s²)*m
 J=Kg*m²/s²

Joules derivationusing Energy formula
 KE=1/2mv²
 J=Kg(m/s)²
 J=Kg*m²/s²


Watts derivationusing the power formula
 P=W/T Power=Work/Time
 W=J/s
 W=N*m/s
 W=(Kg*m/s²)(m/s)
 W=Kg(m²/s²)

Vector
Magnitude + direction


Displacement vs distance
 Displacement is how far you are from where you started in a straight line path,while distance is the total steps you took to get there regardless of the path.
 Displacement is a vector
 Distance is a scalar

Velocity
 V=∆d/∆t
 Velocity equals the change in distance over time
 m/s

****Note: Velocity includes both magnitude and direction, speed is only the magnitude

Acceleration
 a=∆V/T
 Acceleration equals the change in velocity over time
 m/s²

****Note: Since acceleration is proportional to Velocity, when velocity changes EITHER IN MAGNITUDE OR DIRECTION, acceleration changes!

@Rest=no acceleration
Constant velocity=no acceleration

Gravity 10(m/s)/s
 *Every second your velocity changes by 10m/s
 Sec 0= 0m/s
 Sec 1= 10m/s
 Sec 2= 20m/s

When is g positive or negative in a problem?
Consider the three variables: Acceleration (a), Velocity (V) and Displacement (d)

*if all three point in the same direction, then it doesnt matter, they can all be + or 
*If one of them points in a different direction, then you have to pick a point of reference and stick to it.

Which equation can be use when there is NO a? d=vt
distance=velocity*time

Which set of equations is available when there is a?
 d=(Vavg)(t)
 d= Vi*t + (1/2)at²
 Vf²=Vi² + 2ad
 Vf= Vi + at
 or *When Vi=0





In the graph of Displacement vs Time, what does the slope mean? Does the area under the curve have any meaning?
 The slope is Velocity
 No, the area under the curve is useless

In the graph of Velocity vs Time, what does the slope mean? Does the are under the curve have any meaning?
 The slope is acceleration
 Yes, the area under the curve is displacement

What's Newton's first law?
, then velocity is constant
*A body in motion will stay in motion if no there is no net force being applied on the body. Or a body at rest will stay at rest unless there is a net force being applied on the body

What's Newton's second law?
Force=mass*acceleration

What's Newton's Third Law?
Every force has an equal and opposite force

