Energy Equations
(Energy output / energy input ) x 100 = ?
What is energy efficiency ?
1000 Joules = ? Kilojoules
what is 1
KE = (1/2)m v2
what does the m symbolize in this equation?
what is mass
F = ma
this equation is saying
force equals mass times acceleration
what is your favorite campus building
(answers may vary)
From our knowledge of conservation of energy, as kinetic energy goes up, what do we expect potential energy to do?
to go down
if I walk for 1 hour, how many seconds do I walk for?
(1 hour)(60 minutes/ 1 hour)(60 seconds/ 1 min)
= 3600 seconds
how do you convert Joules into Watts?
divide by seconds (time)
? = (vf - vi)/(tf -ti)
what does this equation solve for?
what is acceleration
what is the formula for a linear equation?
y = mx +b
Energy density is
energy density = (energy/ volume)
what are two ways to increase energy density
increase energy
decrease volume
I can make 6 balls of yarn from every sheep I own and I own 4 sheep. I can also make 4 baby blankets from every ball of yarn.
how many baby blankets can I make with my 4 sheep?
6 x 4 x 4 = 24 x 4 = 96 baby blankets
the subscripts f and i mean what respectively
f means final
i means initial
how do I solve for change in position using the equation below:
rf = ri + (vit) + ((1/2)at2)
rf - ri = (vit) + ((1/2)at2)
what is the pythagoran theorem?
a2+b2=c2
KEf - KEi = ?
This equation not only solves for the change in kinetic energy but also something else.
what is work
if I spent $30 at the mall and I was there for 7 hours, how much money would I spend if I were there for 37 hours?
(30/7) x 37 = $158.57
m/s is a measure of...
velocity
If we sum up the area under the velocity vs time graph, what do we get?
the total amount of distance traveled.
how does energy most commonly dissipate
through thermal energy or heat
if KE= PE, how do we solve for velocity?
KE = PE
(1/2)mv2 = mgh --> (1/2)v2= gh
v2= 2mgh
v= (2mgh)(1/2)
What are the units of Newtons?
1N = 1( kgm2/ s2)
what is your best study strategy
(answers may very)
(energy/ time) = ?
what is power
how are position velocity and acceleration all related?
acceleration updates and changes our velocity, velocity changes and updates location. thus any acceleration will be reflected in our position.