unit intro (calculations = speed/momentum). main formulas for today 1. speed

UNIT INTRO(calculations = speed/momentum)

MAIN FORMULAS FOR TODAY

1. SPEED

HOW TO RE-ARRANGE

Everyone pick an even number from 6-50 (we will go around room with your numbers)

HOW TO RE-ARRANGE

Using those even numbers we will divide them by something easy

4 6 8 12 16 20 24 30 40

HOW TO RE-ARRANGE

We get easy fractions…..numbers you probably know how to work in your head.

4 6 8 12 16 20 24 30 40

Re-arranging numbers

I tend to use my favorite fraction when I re -arrange numbers for speed

#’s in formula have a relationship

I tend to use my favorite fraction when I re -arrange numbers for speed

2. MOMENTUM

HOW TO RE-ARRANGE

Think of another even number from (6-50)

HOW TO RE-ARRANGE

WHERE DOES YOUR # go (top / bottom /side)

HOW TO RE-ARRANGE

Does it MATTER what number we divide into your number…..

HOW TO RE-ARRANGE

HECK no……as long as it is easy to work with.

Re-arranging numbers

I tend to use my favorite multiplication numbers when I re -arrange numbers for momentum problems.

All numbers have a relationship

I tend to use my favorite multiplication numbers when I re -arrange numbers for momentum problems.

REPRESENT THE MEANING

30 miles per hour = 30 mph

30 miles per hour = 30 mph60 m/s =

30 miles per hour = 30 mph60 m/s = 60 meters per second

30 miles per hour = 30 mph60 m/s = 60 miles per second25 miles per second =

30 miles per hour = 30 mph60 m/s = 60 meters per second25 miles per second = 25 mi/s

30 miles per hour = 30 mph60 m/s = 60 meters per second25 miles per second = 25 mi/s80 mph =

30 miles per hour = 30 mph60 m/s = 60 meters per second25 miles per second = 25 mi/s80 mph = 80 miles per hour

kg * m/s =

kg * m/s = kilogram-meter per second

kg * m/s = kilogram per meter per secondper hour =

kg * m/s = kilogram-meter per secondper hour = in 1 hr

kg * m/s = kilogram-meter per secondper hour = in 1 hrper second =

kg * m/s = kilogram-meter per secondper hour = in 1 hrper second = in 1 sec

SPEED (GUIDED PRACTICE)

What is the speed of a car that travels 50 miles in 25 minutes?

What is the speed a car travels if it is going 30 miles in 2 hours?

How much time does it take for a broke car….to go 80 miles if it is going 20 miles per hour?

What is the speed of an object that travels 60 miles in 20 seconds?

MOMENTUM (GUIDED PRACTICE)

What is the momentum of a vehicle that has a mass of 1500 kg and is going 10 m/s West?

What is the velocity of a scooter that has a mass of 50 kg and a momentum of 500 (kg * m/s) South?

What is the mass of a vehicle that has a momentum of 2000 (kg * m/s) North and is going 7 m/s.

What is the velocity of a vehicle that has a momentum of 4000 (kg*m/s) East and has a mass of 2200 kg?

unit intro (calculations = speed/momentum). main formulas for today 1. speed

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