SI unit Length
SI unit Mass
SI unit Force
SI unit Time
SI unit Work and Energy
SI unit Power
SI unit Current
SI unit Temperature
SI unit Amt of Substance
SI unit Volume
SI unit subatomic level Length 10^-10 m
SI unit subatomic level Length 10^-9 m
SI unit subatomic level Energy
Electron Volt (eV)
Multiples Factor 10^9
Multiples Factor 10^6
Multiples Factor 10^3
Multiples Factor 10^-2
Multiples Factor 10^-3
Multiples Factor 10^-6
Multiples Factor 10^-9
Multiples Factor 10^-12
Given Vector V find x component
v cos theta
Given Vector V find y component
v sin theta
How do you find the magnitude of the resultant vector and direction of theta if you are given several vectors?
1. Resolve the vectors using the x and y components 2. Add all the x components together and all the y components together 3. Find the magnitude of the resultant using r=sqrt y^2 + x^2 4. Find the direction of theta using tan theta = y/x
Vector. Change in an objects position
Vector. m/s. Change of displacement over change in time
Scalar. Actual distance traveled over change in time
Scalar. Magnitude of the instantaneous velocity
Average velocity as the change in time approaches 0
Vector. Change of velocity over change in time
Average acceleration as change in time approaches 0
Change in instantaneous velocity over change in time
6 linear motion equations
1. V=Vin+at 2. lineV=Vin+V/2 3. Vsq=Vin)+2a^2(x-xin) 4. X-Xin=Vint+at^2/2 5. X-Xin=lineVt 6. X=Vxt
Vector. Measure of gravitational force on mass
Scalar. Its the amount of matter an object has
Acceleration is in the opposite direction of
Newtons First Law
F=ma=0 A body at rest or in constant motion will remain that way unless a force acts on it
Newtons Second Law
sumF=ma Force applied to a body will cause the body to accelerate in that direction only if the sum of all forces do not equal zero
Newtons Third Law
Fb=-Fa To every action there is an equal and opposite reaction
Gravitational Force Equation
What 2 things should be remembered about the gravitational force equation
F is inversely proportional to r2 and if r is halved then F is quadrupled.
Motion where there is no rotation
Forces applied to an object cause the object to rotate around a fixed point (fulcrum)
Application of force at some distance from a fulcrum generates torque causing the object to undergo rotational motion.
t=rFsintheta r is the distance between the fulcrum and point of force, theta is the angle between the F and the lever arm
What is the displacement of an object moving in uniform circular motion after the completion of one complete cycle?
In uniform circular motion, what is the magnitude of the tangential force? and why?
Zero because there is no change in speed of the object because its constant.
What is the resultant force of an object moving in uniform circular motion?
The radial force because the tangential force is zero
In uniform circular motion, acceleration is always in the same direction as the
Circular motion equation
Centripetal acceleration equation
What are the two kinds of friction?
Static friction (not moving) and Kinetic friction (moving)
Static friction equation
occurs between a stationary object and the surface that it rests on
Kinetic friction equation
occurs between a sliding object and the surface that its sliding on
How are the Kinetic friction and Static Friction equations different?
The kinetic friction equation has an equal sign the static friction equation has a less than or equal to sign meaning kinetic friction will have constant value for any given combination of coefficient of kinetic friction and normal force
Which will have a higher maximum value static friction or constant kinetic friction?
static friction it takes more force to move something than to get an object to slide and keep it sliding