1. The problem statement, all variables and given/known data Explain the shape of the velocity-displacement and acceleration-displacement graphs for an object undergoing simple harmonic motion. The graph is attached to this thread 2. Relevant equations v = wsqrt(A^2-x^2) where w = angular frequency, A = amplitude and x = displacement a = - w^2x 3. The attempt at a solution I get the acceleration-displacement graph. The acceleration is proportional to the displacement which means you will get a straight line (with a negative slope because of the minus sign). I can't figure out why the velocity-displacement graph is circular?