A skydiver steps from a helicopter and falls for a few seconds until terminal velocity is reached. Thereafter, until he opens his parachute, his acceleration
A) is constant.
B) increases.
C) decreases.
D) is zero.
E) none of the above
Question 2
A coconut and a bird's feather fall from a tree through the air to the ground below. The force of air resistance is
A) greater on the coconut.
B) greater on the feather.
C) the same on each.