HON PHYSICS DAY 34 Oh what a day planned! 1) We discuss the HW, finalize answers 2) You do a mini-quiz on ideas from the homeworks 3) We finish the problems from the previous day, and in doing so, become more familiar with momentum and impulse 4) We start our 6 th topic of Physics: Energy and Work! 5) You start by making a list… 6) You get a great flowchart from me, and we discuss two forms of energy 7) We discuss the idea of total energy of the system, and see a kickbutt roller coaster

S O …A NY Q UESTIONS ?

REMINDER HW C OLLECTION FRI/MON Possible ones: Day 26/27 (packet) Day 31 (Yellow Impulse and Momentum) Day 32 (Yesterday) SEE ME IF YOU HAVE A QUESTION ABOUT ANY OF THESE, OR ASK NOW. SERIOUSLY. THIS IS A LEARNING OPPERTUNITY

M INI Q UIZ 20 minutes, 4 questions. Can use formula sheet Can use all notes and homework…after 10 minutes in. I will let you know.

L ETS G O O VER I T P ART O NE :

L ETS G O O VER I T P ART T WO :

N OW FOR SOMETHING KIND OF SIMILAR. Your task: Come up with as many energy forms as you can in 5 minutes. Get ready to defend/explain/shout from your list.

T HE F ORMS W E CARE ABOUT Kinetic and Potential. Kinetic: Energy of motion. Potential: Energy stored in a ‘field’. For us, usually in the form of Gravity.

L ETS S EE AND D RAW A R OLLER C OASTER This is the TOP THRILL DRAGSTER. Height of the coaster: 420 feet tall (130m) Accelerated to a speed of 120 mph (190 km/h) in 3.8 seconds and then begins to vertically climb. 17 seconds for the ride 18 riders per train, train mass is 15 tons (13,600kg) empty. Lets see it!

5 dots correspond to different parts of the ride. Dark Blue: At the start. Moving very fast. No height. So 100% of the system energy is Kinetic.

5 dots correspond to different parts of the ride. Red: Halfway up. If there was no energy ‘dissipated’ (isolated system!) 50% of system energy is Kinetic, 50% is Potential

5 dots correspond to different parts of the ride. Green: At the top. Not moving. So 100% of the system energy is Potential (if isolated)

5 dots correspond to different parts of the ride. Light Blue: Halfway down. If there was no energy ‘dissipated’ (isolated system!) 50% of system energy is Kinetic, 50% is Potential

5 dots correspond to different parts of the ride. Pink: At bottom. 100% of system energy is Kinetic (if isolated). Then to stop it the coaster absorbs all the energy, making it stop. This is an outside force.

BUT WHAT IF IT WAS NOT ISOLATED? What would happen?

HON PHYSICS DAY 34 Oh what a day planned! 1) We discuss the HW, finalize answers 2) You do a mini-quiz on ideas from the homeworks 3) We finish the problems from the previous day, and in doing so, become more familiar with momentum and impulse 4) We start our 6 th topic of Physics: Energy and Work! 5) You start by making a list… 6) You get a great flowchart from me, and we discuss two forms of energy 7) We discuss the idea of total energy of the system, and see a kickbutt roller coaster