- #1

radaballer

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## Homework Statement

A solenoid which is 0 meters away from a ferrous piece of metal exerts how much force on it? there is 0.42 amps, and 1000 turns in the coil. the cross-sectional area is 2.8502e-4 meters^2

## Homework Equations

Force = ((N x I)^2 x k x A) / (2 x g^2)

N = the number of turns in the solenoid

I = the current, in amperes (A), running through the solenoid

A = the cross-sectional area, in meters-squared, of the solenoidal magnet

g = the distance, in meters, between the magnet and the piece of metal

k = 4 x pi x 10^-7

## The Attempt at a Solution

I am not sure how to attempt seeing that the 0 meters of separation would cause the force to be infinite according to the equation