How to Survive Physics and the Metric System

8/13/13

Bellwork 8/13/13

On a scale of 1 – 10, how familiar are you with the metric system?

1 (there’s a metric system? / not familiar at all)

10 (the metric system rules, what are these English units? / very familiar)

Today’s Agenda

Bellwork Finish the Round Robin Activity Round Robin Post Lab Intro to the Metric System Dominoes

Round Robin Post-Lab

Please try to solve for the following.1) Given: F = ma ; Solve for m2) Given:

Solve for R3) Given: d = ½ a · t2

Solve for t4) “Farmer Exchange” will be addressed later

V ─ = IR

Round Robin Post Lab

Pepsi Cans Pulleys Physics Carts Genicons Measuring and

Calculating Volume Falling Objects

Tuning Forks Mirrors Optical Illusions Magnet and Compass Prisms Ball Rolling

Round Robin Races!

Tennis = 58.4 g Golf = 46.4 g Racquet = 42.3 g Foos = 24.6 g Styrofoam = 11.2 g Practice = 4.4 g Wiffle = 4.3 g Ping Pong = 2.9 g

Race Order

1. Foos (24.6 g)

2. and Golf (46.4 g)

3. Styrofoam (11.2 g)

4. Racquet (42.3 g)

5. Ping (2.9 g)

6. Practice (4.4 g)

7. Tennis (58.4 g)

8. Wiffle (4.3 g)

Essential Math Concepts to Survive Physics Solving algebraic equations Distinguishing between quantities,

variables and units Organizing physics problems (T-Charts) Calculating with scientific notation Metric (time) and English conversions Identifying and rounding significant

figures

Metric Units (base unit)

Quantity Base Unit Symbol

Length Meter m

Mass Gram g

Time Second s

Volume Liter L

Force Newton N

Energy Joule J

Metric Prefixes

Prefix Prefix Symbol Multiplier

mega- M 106 (1000000)

kilo- k 103 (1000)

BASE UNIT - 100 (1)

centi- c 10-2 (0.01)

milli- m 10-3 (0.001)

micro- μ 10-6 (0.000001)

Metric Prefixes *Learn highlighted ones!

Prefix Prefix Symbol Multiplier

mega- M 106 (1000000)

kilo- k 103 (1000)

BASE UNIT - 100 (1)

centi- c 10-2 (0.01)

milli- m 10-3 (0.001)

micro- μ 10-6 (0.000001)

Metric Units with Prefixes

You can add any prefix to a base unit (time has an exception)

km is kilometers MJ is megajoules mL is milliliters μs is microseconds

Time Exception

When going to longer time units 60 s = 1 min (minute) 60 min = 1 hr (hour) 24 hr = 1 day 365 days = 1 yr (year)

Quick Practice

What would the metric symbol be for the following?

centimeter kiloliter microgram millimeter megameter

What do the following quantities represent?

kN ML

1. μm

2. ms

3. cg

Quick Practice (answers)

What would the metric symbol be for the following?

cm kL

1. μg

2. mm

3. Mm

What do the following quantities represent?

kilonewton megaliter

1. mircometer

2. millisecond

3. centigram

Note: be careful of capital and lower case letters!!!

Now Onto Dominoes…