Use the Following Figure for the Next Problem

Multiple Choice

Use the following figure for the next problem:
-A classic demonstration illustrating eddy currents is performed by dropping a permanent magnet inside a conducting cylinder.The magnet does not go into free fall.Instead it reaches terminal velocity and can take a few seconds to drop a length of about a meter.Suppose the mass of the magnet is 70 g and it has a terminal velocity of 10 cm/s.The length of the pipe is 80 cm.What is the magnitude of the magnetic force on the magnet when it is falling at the terminal velocity?

A) 0.35 N
B) 0.79 N
C) 0.97 N
D) 0.69 N
E) None of these is correct.