Warm-Up Exercise for lecture 3

Due 8:00 am, Tues, Sep 8

Physics 105, Fall 2009

T/F: It doesn't matter which order you add two vectors together, you will get the same sum either way.
true
false

Which geometrical shape does a 2D projectile follow?
line
circle
ellipse
parabola
hyperbola

A man on a treadmill is walking at 1.5 m/s to the left. The treadmill is going at 2 m/s to the right. If you are standing still, it looks like the man is moving:
0.5 m/s left
3.5 m/s left
stationary
0.5 m/s right
3.5 m/s right

Ralph is confused about how his book defined the components of a vector. The book says, "The components of a vector are the projections of the vector along the coordinate axes". What can you tell Ralph to help him understand what this means?