The question is: Two horizontal forces F1 and F2 act on a 1.8 kg disk that slides over frictionless ice, on which an xy coordinate system is laid out. Force F1 is in the negative direction of the x axis and has a magnitude of 3.0 N. Force F2 has a magnitude of 9.0 N. The figure below gives the x component vx of the velocity of the disk as a function of time t during the sliding. What is the angle between the constant directions of forces F1 and F2? The graph is a Vs(m/s) vs t(s). It starts down at -4 m/s when time = 0 and it is a staight line up to +5m/s at time = 3 and the function crossed the x-axis around 1.3333ish (doesnt give an exact point). how do I go about interupting this graph to help give me F2net . . .I think i know how to get the angle and I know that . . . F1x = 3.0 N and F1y = 0 N so. . how to get F2x and F2y from the graph. .