Slide deck from a SMART Notebook file used to teach about various "reveal techniques" and the pedagogy behind using a SMARTboard. Workshop held at Boston University as part of the EdTech Teacher Workshop series, 19 July 2010.
6. Combinations (the "Choose" Formula)
A combination is arrangement of objects where order does not matter.
move to
back
n is the number of objects On the calculator ...
available to be arranged Press: [MATH]
[<] (Prb)
[3] (nCr)
r is the number of objects
that are being arranged.
7. Rhonda lives 5 km from Morris in a
SW direction. Travis lives 5 km SW
of Thompson. Are the two vector
quantities equal? Explain.
move to back
frame reveal
8. What happens when the base of an exponential function is negative?
x
ƒ(x) = (-2) co-creating
notes
ƒ(x) = (-2) x ≠ ƒ(x) = -2 x
9. The Triangle Method ...
We use the triangle method when the vectors are arranged tip-to-tail.
6cm enlarge
Scale: 1 cm = 2 km
reveal
10cm
RESULTANT
23.4 km 59° S of E
RESULTANT
11.7 cm 59° S of E
Remember, we use measurements with a ruler and protractor to find
the "answers."
10. A large black ant pulls a breadcrumb N32°E with a force of 0.03 N.
A small red ant pulls with a 0.045 N force in the direction E5°S.
Determine the magnitude and direction of the resultant force.
HOMEWORK
8°
70.4
ING 4 N
enlarge
BE 0.064
AR
reveal
can you find it?
12. Identify each of the following quantities as scalar or vector.
infinite clone, scalar vector
drag'n drop
(a) There are five people living (d) Jeff was driving at
in the house just north of yours. 100 km/h for 40 minutes.
(b) The airplane flew 515 (e) Jess jogged six blocks
km/h at a bearing of 315°. west along Portage Avenue.
(c) Today we had a (f) The boat was headed
30 km/h north wind. N42°W across the lake.
13. Identify each of the following quantities as scalar or vector.
layering
reveal
(a) There are five people living (d) Jeff was driving at
in the house just north of yours. 100 km/h for 40 minutes.
vector? scalar
(b) The airplane flew 515 (e) Jess jogged six blocks
km/h at a bearing of 315°. west along Portage Avenue.
vector vector
(c) Today we had a (f) The boat was headed
30 km/h north wind. N42°W across the lake.
scalar neither