1. Units, scientific notation.ppt
Ch. 1 slides
Units, scientific notation.ppt

2. Scientific notation 1,234 0.000576 3.4 x 10-3
We often use scientific notation to describe quantities in physics, especially for very large or very small numbers.
Express the following numbers in scientific notation or convert from scientific notation to a standard number. Do not use a calculator to help.
1,234
3.4 x 10-3
Simplify the following, and keep in scientific notation (no calculator!): 4× 10 −9 ∗6× 10 −5 3× 10 −6

3. Units
Some of the primary units used in this course are for the following quantities:
time seconds (s)
distance meters (m)
mass kilograms (kg)
Convert the following quantities into the standard units
120 ms
50 km
12 mg
100 km/hr

4. Units to help solve problems
2 groups of students are working to clean a beach. It takes each group 5 minutes to clean up 200 m of a beach. How long does it take to clean up 2 km of beach? Use rates and units conversion to solve the problem.

5. Electric car
Elon Musk of Tesla said that the Model S in “Ludicrous Speed” mode can go from 0 to 60 mph in 2.8 seconds. Use units analysis, knowing that velocity is m/s and acceleration is m/s2, to find the acceleration of the Tesla.
(You can also use a conversion of 1.6 km = 1 mi.)

6. Vectors
Consider the following two vectors:
vectors.ppt

7. Vector subtraction 1) 2) 3) 4)
vectors.ppt