A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 3.62 g coins stacked over the 20.3 cm mark, the stick is found to balance at the 22.5 cm mark. What is the mass of the meter stick

0.5792g

Explanation:

The computation of the mass of the meter stick is shown below:

Let us assume the following items

x1 = 50 cm;

m2 = m3 = 3.62 g;

x2 = x3 = 20.3 cm;

xcm = 22.5 cm

Based on the above assumption, now we need to apply the equation of center mass which is given below:

27.5 m1 = 15.928

So, the m1  = 0.5792g

c) up is the direction the magnetic force is acting on the charge.

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