Think up a conservation of energy problem, and sketch the arena. There must be at least one spring (you choose the spring constant), and you can use that to either give the object an initial potential energy (which is to be converted to speed/motion). There must be two ramps, one upward and one downward, and somewhere a few meters of friction (with kinetic friction coefficient of 0.15 ). (b) Calculate the objects speed after each part (ramp, friction, spring, etc.), and (c) the work done by the piece of friction on the object.