Energy
What types of energy are there?
What types of energy are there?
•Nuclear
•Fusion
these we have talked about
•Fission
•Mechanical (Kinetic)
•Potential
•Gravity
•Springs
•Chemical
•Light
•Heat
•Electrical
Kinetic and Potential Energy
•From our study of Friction, what might kinetic energy mean?
•Energy of motion
•Large objects (meteors)
•Small objects (bullets, raindrops, marbles)
•Tiny objects (molecules, atoms)
•http://www.middleschoolchemistry.com/multimedia/chapter1/les
son2
•What variables might be in an equation to calculate kinetic energy?
•Mass, speed
•KE = ½ mv2
•https://video.search.yahoo.com/yhs/search;_ylt=A0LEVjWbh6xU4WAASVg
PxQt.;_ylu=X3oDMTBsa3ZzMnBvBHNlYwNzYwRjb2xvA2JmMQR2dGlkAw-?p=meteor+bombardment+simulation+heat&hspart=mozilla&hsimp=yhs001
•https://search.yahoo.com/yhs/search?p=discovery+asteroid+hit+earth+sim
ultion+music&ei=UTF-8&hspart=mozilla&hsimp=yhs-001
•https://video.search.yahoo.com/video/play;_ylt=A2KLqIOkh6xUyCs
Ao0D7w8QF;_ylu=X3oDMTByZWc0dGJtBHNlYwNzcgRzbGsDdmlk
BHZ0aWQDBGdwb3MDMQ-?p=meteor+bombardment+simulation+heat&vid=064890ef12413c5
40ef31a7b44aaf1e2&l=9%3A59&turl=http%3A%2F%2Fts1.mm.bing
.net%2Fth%3Fid%3DVN.608049476970087364%26pid%3D15.1&ru
rl=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Dzc4HL
_-VT2Y&tit=Miracle+Planet++Asteroid+Impact+Simulation&c=0&sigr=11bn9r4b7&sigt=11bqo14b
9&age=0&fr2=p%3As%2Cv%3Av%2Cm%3Asa&hsimp=yhs001&hspart=mozilla&tt=b
Kinetic and Potential Energy
•What might potential energy mean?
•Examples
•An object at the edge of a cliff
•A mass on a spring
•A stretched rubber band
•A can of gasoline (chemical potential energy)
•What do we have left when all of the potential energy is used up?
Kinetic and Potential Energy
•What might potential energy mean?
•Examples
•An object at the edge of a cliff
•
•A mass on a spring
•
•A stretched rubber band
•
•A can of gasoline (chemical potential energy)
•
Kinetic and Potential Energy
•What might potential energy mean?
•Examples
•An object at the edge of a cliff
•Mass, height, gravity
•A mass on a spring
•Stretch length, spring strength
•A stretched rubber band
•Stretch length, spring strength
•A can of gasoline (chemical potential energy)
•Volume, octane rating?
Potential Energy
•An object at the edge of a cliff
•Mass, height, gravity
•PE = mgh
•Where m is mass in kg (cm)
•g is 9.81m/sec2 (981 cm/sec2)
•h is the height in meters (cm)
Gravitational Potential Energy
Gravitational Potential Energy
PE = mgΔh
h
How could we measure the effect of potential energy?
- Given a bunch of marbles or steel balls
Tomorrow we will run an experiment to measure the effect of Potential
Energy
- By dropping them into flour and looking at the craters
Craters are everywhere!
Andy Saulietis
LPL / UA
The Moon
Apollo 17
NASA