Slide 5
Slide 5 text
B
X : 0
4 5 M P H
A
X : 1 5
2 0 M P H
T H E H A R D WAY:
!
T R A I N A L E A V E S T H E S TA T I O N A T 2 : 1 5 , G O I N G 2 0 M I L E S P E R H O U R
T R A I N B L E A V E S T H E S TA T I O N A T 3 : 0 0 , G O I N G 4 5 M I L E S P E R H O U R
?
I’m not going to lie. The first time I was shown this problem, I thought “Oh, snap. We’re going to have to use calculus”. On the surface, this is a hard
problem to solve, with multiple moving objects going at different speeds.
!
However, my teacher’s purpose in showing us this problem wasn’t to teach us math. It was to teach us about how to frame (and reframe) problems.