9) If an object falling freely were somehow equipped with an
odometer to measure the distance it travels, then the amount of
distance it travels each succeeding second would be A)
constant.
B) less and less each second.
C) greater than the second before.
D) doubled.
10) A feather and a coin will have equal accelerations when
falling in a vacuum because
A) their velocities are the same.
B) the force of gravity is the same for each in a vacuum.
C) the force of gravity does not act in a vacuum.
D) the ratio of each object's weight to its mass is the
same.
E) none of these
11) A falling skydiver of mass 100 kg experiences 500 N of air
resistance.
The acceleration of the skydiver is
A) 0.2 g.
B) 0.3 g.
C) 0.4 g.
D) 0.5 g.
E) more than 0.5 g.
12) A ball thrown straight upward takes 10 seconds to go up and
return to the ground. Because of air resistance, the time taken for
the ball just to go up is
A) less than 5 s.
B) more than 5 s.
C) 5 s.