box of mass 2kg on spring with k=13 N/m, they are on a wheel. The road has an amplitude δ = 2 cm as shown above. What speed is necessary for the mass to have a maximum amplitude x = 2δ . the picture looks something like this __ |__| m=2kg \ / k=13 N/m \ /--\__________________ \--/ 16.0 cm ^ the thing the bottom of the spring is connected to looks like a wheel. the distance is 16 cm. can anyone help me, very confusing question.