ROTARY MOTION SENSOR FORCE SENSOR LEVEL TRACK 100 G -WEIGHT a) What is the definition of mechanical energy? b) Set the cart-spring-weight system in motion and observe it. What kinds of energy would you associate with the system during the oscillation? c) Write a complete expression for the total mechanical energy of the system. Your expression should include all known and measurable quantities (mass, position, velocity, etc.). Clearly define all of the variables in your equation (for example, in your lab notebook, write “M is the mass of the cart”). For clarity, use different symbols for the masses of different objects (i.e. the mass of the cart should be represented by a different variable than the mass of the weight).