5' The total mechanical energy of this system at any given time must be the sum of the rotational kinetic energy @100?) of the wheel, the translational kinetic energy [%mv2) of the load, the gravitational potential energy (MgH) of the wheel, and the gravitational potential energy (mgh) of the load. Ignoring friction, the total mechanical energy is constant over the entire motion (i.e. it is conserved). 4>Pre-Iab question 1 Given that both the wheel and the load are initially at rest, write down an expression for the total mechanical energy ETotal of the system just before the load is released. This should be in terms of the initial height h of the load. the initial height H of the wheel's centre of mass. the mass m of the load, and the mass M of the wheel. >Pre-Iab question 2 Write down an expression for the total mechanical energy ETmal of the system just as the load reaches the ground. This should be in terms of the velocity v of the load, the angular velocity (u of the wheel, and the moment of inertia | of the wheel