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, becomemore familiar with momentum and impulse

4) We start our 6th 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

SO…ANY QUESTIONS?

REMINDER HW COLLECTION 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

MINI QUIZ

20 minutes, 4 questions.

Can use formula sheet

Can use all notes and homework…after 10 minutes in. I will let you know.

LETS GO OVER IT PART ONE:

LETS GO OVER IT PART TWO:

NOW 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.

THE FORMS WE CARE ABOUT

Kinetic and Potential.

Kinetic: Energy of motion.

Potential: Energy stored in a ‘field’. For us, usually in the form of Gravity.

LETS SEE AND DRAW A ROLLER COASTER

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 todifferent parts of theride.

Dark Blue: At the start. Moving very fast. No height. So

100% of the system energy is Kinetic.

5 dots correspond todifferent parts of theride.

Red: Halfway up. If there was no energy ‘dissipated’ (isolated

system!) 50% of system energy is Kinetic, 50% is Potential

5 dots correspond todifferent parts of theride.

Green: At the top. Not moving. So 100% of the

system energy is Potential (if isolated)

5 dots correspond todifferent parts of theride.

Light Blue: Halfway down. If there was no energy

‘dissipated’ (isolated system!) 50% of system energy is Kinetic, 50% is Potential

5 dots correspond todifferent parts of theride.

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, becomemore familiar with momentum and impulse

4) We start our 6th 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