
Geometry
I Activity
If
so instructed by your teacher, print out a worksheet page for these problems.
This slide shows the
balance of forces on a descending glider. A horizontal, thin red line
has been drawn parallel to the ground. The flight path of the glider is
along the other thin red line which falls to the left. These two lines
form an angle "a" called the glide angle.
The weight of the
glider is given by the symbol "W" and is directed vertical, toward the
center of the earth. The weight is then perpendicular to the horizontal
red line drawn parallel to the ground. The drag of the glider is designated
by "D" and acts along the flight path opposing the motion. Lift, designated
"L," acts perpendicular to the flight path.
Problems:
 Prove angle a is
congruent to angle b, given the above relationships
 Prove angle b is
congruent to angle k, given the above relationships
 Prove angle a is
congruent to angle k, given the above relationships.
