Difficulty creating this function to produce a plot

I'm having difficulty working out how to do this task, any help would be appreciated.

The displacement x(t) of a forced, undamped, oscillating spring mass system is given to be:

x = (F0/w(w^2-w0^2))(wSin(w0*t)-w0*Sin(wt))

where F0 is the amplitude of the forcing function, w is the natural frequency of the system and w0 is the frequency of the forcing function. Write a function m-file forced.m that, for defined values of w and w0, produces a plot of the variation of x/F0 for value of t in the range 0 =< t =< 500.

Use this m-file with the defined values w = 1 and w0 = 2, 1.2 and 1.02 in turn. The plots produces should illustrate the phenomenon of beats for the case w0 = 1.02, with the amplitude of the oscillation exhibiting a sinusoidal oscillation.

I'm not sure how I would plot x/F0, and I don't know what the 'phenomenon of beats' is, unless it is referring to Beats by Dre.

Attempt:

function forced(w,w0)

x=f0/(w*(w^2-w0^2))*(w*Sin(w0*t)-w0*Sin(w*t));

t=0:1:500;

plot(x/f0)

grid on

end

Of course, this isn't right, but I don't know where to go from here. It tells me that 'F0' has not been defined, but I haven't been given a value for F0. I'm also not sure where exactly I put the input variables w and w0 after I have made the function.

[M]

https://fr.mathworks.com/help/matlab/ref/function.html

In your function, you are using f0 at the first line, but it has not been defined so Matlab cannot know its value.

w and w0 are ok because you give them as input of your function.