Two forces are each applied to an area of 0.03  m2.
the first is applied with a pressure of 45  n/m2, and the second with a pressure of 60  n/m2.
find the difference between the size of the forces.

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Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.