1/12/10
Post date: Jan 11, 2010 7:16:15 PM
Bell Ringer: What is speed?
Units in calculations
treat units just like variables during calculations
units can multiply together, be squared, divide out, etc.
Examples:
15 m / 5 sec = 3 m/sec
3 ft x 4 ft = 12 ft^2
25 N / 5 N = 5
Speed
Rate of movement
v = d / t (speed = distance / time)
Units for speed: distance unit / time unit or distance unit "per" time unit
In SI system, we usually use m/s for speed
Speed practice
At what speed can you "moonwalk?"
How long would it take you to "moonwalk" to the moon (384.4 x 10^6 m)
Measuring motion lab
measuring and graphing the motion of a bowling ball and a skateboard
can be found in the file cabinet or page 12 of your lab book
due Thursday