Tuesday, December 10, 2013

By the end of the day today, IWBAT…• Calculate momentum and explain the relationship between momentum, mass, and velocity

Do Now: An ice skater applies a horizontal force to a 20 kg block on frictionless, level ice, causing the block to accelerate uniformly at 1.4 m/s2 to the right. Determine the magnitude of the normal force acting on the block.

Why it matters in THIS CLASS: Unit #7 Content approximately ½ of your upcoming Final Exam

By the end of the day today, IWBAT…• Calculate momentum and explain the relationship between momentum, mass, and velocityWhy it matters in

LIFE:“Momentum” is a term you hear a lot in every day life (i.e. sports, political/social movements, etc) but now let’s make the connection to physics

What it might look like on a test:

Agenda + Announcements

Do Now 5 mins

Agenda 3 mins

Momentum C-Notes 15 mins

Work it Out 10 minsRube Goldberg

Planning 17 mins

10 days!!!!!!!

I am so proud of all my hardworking physics students! You are almost to the end of your the fall semester!

The Plan09

Intro to Momentum

10

Momentum vs. Impulse

11

Conservation of Momentum

12

Momentum Lab

13

Rube Goldberg Devices Due In Class TODAY

16

Last Day for Full Review in all Classes

17

FINALSP. 03 & 04

18

FINALSP. 05 & 06

19

FINALSP. 01 & 02

20

FINALSP. 07 & 08

Proud & Courageous Eagles

Honesty & Respect:Students are given all

necessary tools to do well on physics exams.

Our BEST Eagles prepare their own materials and complete

work with their groups, rather than blindly copy someone

else’s work.

Proud & Courageous Eagles

Self-Control:Control of one’s emotions, desires, or actions by one’s

own will.Academic Integrity is an

important factor in individual growth.

Students that cheat reduce their ability to learn &

sabotage their growth!

• The Unit 7 Cover Sheet goes into your journals to keep track of

your completed daily work prior to the exam. Record all

assignments and keep it together.

Unit 7: Momentum & Impulse

Monday, 12/09/13TEKS:

P.6C: Calculate the mechanical energy of,

power generated within, impulse applied to, and momentum of

a physical system

By the end of today, IWBAT…

Define and calculate

momentumEssential Question:

What is momentum?

Topic:Momentum

Information for your CNotes

Momentum Momentum = Mass in motion Any object that is moving has

momentum

vs

Demo

Which is harder to stop?

Which is harder to stop?

fast

slow

Click on this link to learn more about the physics of bowling

What is the equation for momentum?

Momentum depends on the mass of the object and the velocity at which its traveling

Momentum is DIRECTLY proportional to mass and velocity. (if mass , momentum , if velocity , momentum )

Momentum = mass x velocityp = m x v

What are the units for momentum? p = m x v

Momentum = mass x velocity

kg∙m/s = kg x m/s

What are the units for momentum? Units = kgm/s

Measurement UnitDistance Meters (m)Time Seconds (s)Velocity m/sAcceleration m/s2

Force Newton (N)Momentum kgm/s

Think, Pair, Share

OR

WHICH HAS MORE

MOMENTUM?

What if I tell you…. Mass of the bullet = 0.045 kg Velocity of bullet = 3000 m/s

Mass of elephant= 1250 kg Velocity of elephant= 0.108 m/s

And the winner is….p = mv

pbullet = (.045 kg)(3000m/s) = 135 kg∙m/s

pelephant = (1250 kg)(.108 m/s) = 135 kg∙m/s

EQUAL!!

Work it OutDetermine the momentum of … 60-kg halfback moving at 9 m/s 1000-kg car moving at 20 m/s. 40-kg freshman moving at 2 m/s.

A bicycle has a momentum of 24 kgm/s. What momentum would the bicycle have if it had …

twice the mass and was moving at the same speed? the same mass and was moving with twice the speed? one-half the mass and was moving with twice the speed? three times the mass and was moving with one-half the

speed? three times the mass and was moving with twice the speed?

Rube Goldberg Project Plans

Begin working on your device. You will present your functional device during class on Friday, December 13th.

Formulate a solid plan using the instructional guide and resources on the project webpage (found under the ‘Work & Energy’ tab).

You must be both creative and logical, initiating a manageable plan to build the device using materials you can easily acquire for construction during this week. The most effective devices are constructed, tested, manipulated and retested well in advance of the due dates to ensure functionality.

Submit the first phase of design plans with your partners. Keep YOUR OWN INDIVIDUAL COPIES, turn in ONE planning sheet that includes: Group name and members Materials you will use (a minimum of 6 segments with

transitions) Rudimentary schematics (*see example template)

Exit Ticket Upon what two things does momentum

depend?

What letter represents momentum?

If mass and velocity double, what will happen to an object’s momentum?