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?
Think of shining a light perpendicularly towards an axis, with the arrow blocking the light beam. The "projection" of the arrow is just the shadow the arrow creates on the axis.