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**1. Homework Statement**

A solenoid lies horizontally with a current balance WXYZ balanced in the solenoid core. Sides WX and ZY are 7.1 cm and side XY is 1.9cm. A current of 6.0A flows through the conductor of the balance. If a 17.6g mass is necessary to balance the current balance what is the magnetic field strength of the solenoid - ANSWER - 1.51T

**2. Homework Equations**

Fm=Fg

BIL=mg

**3. The Attempt at a Solution**

i attempted to do them seperately.

b= mg/IL that is literally all i can get from this perphaps if i was given a diagram it would help.

Ive tried substituing l as 7,1 and 1.9, adding the two lengths and subtracting them didnt work

anyone know how to do this?