A 100-newton sack of potatoes falls from an airplane. As velocity of fall increases, air resistance also increases, and when air resistance equals 100 N, the acceleration of the sack is
1) zero
2) 5 m/s2
3) 10 m/s2
4) 100 m/s2
and the velocity of the sack will be
5) 0 m/s.
6) 5 m/s.
7) 10 m/s.
8) 100 m/s.
9) constant.
Question 2
A heavy man and a light man parachute together from a high-flying plane. The first to attain zero acceleration will be the
1) light man
2) heavy man
3) both will attain zero acceleration at the same time.
because
4) the gravitational force on each man is the same.
5) of the lesser gravitational force acting on the lighter man.
6) air resistance will eventually counterbalance the weights of both men.
7) the lighter man will not have to fall for as long a time before air resistance equals his weight.
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