Yeah, I'm kind of sneaking two into this one question. If you're already solid on the previous questions, they'll be quick. If you're not, please use the opportunity... a) Go back to problem #2 in PS 3, throwing stones off a cliff. First go back and explain the reasoning using the kinematics of constant acceleration. Then go back and explain what happens in terms of conservation of energy. Do the answers agree? Do both approaches make sense? b) Go back to problem 4 from last time, PS 5. Compare the work you do in pulling the cart of mass 3 kg and the cart of mass 6 kg. How does that calculation compare with the calculation before