A 71.80 kg person holding a steel ball stands motionless on a frozen lake.
The person then throws the ball, which propels the person at 0.15 m/s to the
right and the ball 3.50 m/s to the left. If the initial momentum of the system is
zero, what is the mass of the steel ball?
A. 3.08 kg
B. 3.50 kg
O C. 20.51 kg
O D. 23.33 kg​