1a) and b) Nice upside down bowl shape and to cover it with total energy line.

c) Simple harmonic motion is full of hidden information. PEmax = KE max . Hence max velocity can be found.

d) max velocity of SHM must be memorised . Get it and find w to find T.

e) a = - w2x . Hence sub in known value of w2 and write the equation in box. The graph must be straight line with negative gradient . Be sure to end the line at o.2 m and -0.2 m and the x axis.

2. g at the surface is GM/r2 and weight = mg . Energy needed in GPE = GMm/r .

For satellite equate g with circular motion acceleration. GM/r2 = w2r. GM = w2r3. Hence r can be found. height = r - ro.