using the work-kinetic energy theorem:

.5mvo^2 + Fo/c = .5 mv1^2 where v1 is the velocity at x max I got the following but it is not formatted proprerly. Where am I wrong?

.5vo^2 +Fo/c*m = .5v1^2
vo^2 + 2Fo/c*m = v1^2
sqrt (vo^2 + 2Fo/c*m) = v1

What is c?

m to the -1 power

c= m to the -1 power

then I don't understand your second term:

Fo/c*m if c= m^-1, then
Fo/(1/m *m)=Fo

which is not right. YOu cant add Fo to KE to have work energy.

You have correctly applied the work-kinetic energy theorem equation, but there seems to be a mistake in your simplification. Let's go through the steps again to identify where the error occurred.

The work-kinetic energy theorem states that the work done on an object is equal to the change in its kinetic energy. It can be expressed as:

W = ΔKE

where W is the work done, ΔKE is the change in kinetic energy, m is the mass of the object, vo is the initial velocity, v1 is the final velocity, and Fo/c represents an external force acting on the object over a distance x.

To solve for v1, we can start with the equation:

0.5mvo^2 + Fo/c = 0.5mv1^2

First, let's multiply both sides of the equation by 2 to eliminate the 0.5 factor:

mvo^2 + 2(Fo/c) = mv1^2

Now, let's isolate v1 by subtracting mvo^2 from both sides of the equation:

2(Fo/c) = mv1^2 - mvo^2

Next, let's divide both sides of the equation by m to isolate v1^2:

2(Fo/c)m = v1^2 - vo^2

Finally, to solve for v1, we take the square root of both sides of the equation:

√(2(Fo/c)m) = √(v1^2 - vo^2)

So the correct equation for v1 is:

v1 = √(vo^2 + 2(Fo/c)m)

Therefore, your original equation should be:

v1 = √(vo^2 + 2(Fo/c)m)

Make sure to double-check your calculations and ensure that you're using the proper values for all variables involved.