Looking at the experimental setup and given that both the wheel and the load are initially at rest, write down an equation for the total mechanical energy E of the system just before the load is released. This should be in terms of the gravitational acceleration g and the following variables; 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. For your answer, please follow the following: Please write the answer without any blanks. For powers use ^ ie for v2 use v^2. Please use the common order for the letters, as used in the lectures/textbook ie for kinetic energy E=1/2mv^2 (not E=1/2v^2m) Write your answer in the following form: E=1/2(ab+cd^2) (your answer might not be in this form, this is just to demonstrate how multiplication, division, addition, power,... should be written. Note: only factorise numbers not variables i.e do not factorise g)简答题