a) KE at h = 30 m
KE = 0
b) PE at H = 30 m
PE = mgh = 2*9.8*30 = 588 J
c) TE = PE + KE = 0 + 588 = 588 J
d) h= 0
KE = 0.5*mv^2
v^2 = 2gh
KE = 0.5*2*2gh = 588 J
e) PE at h=0
PE = mgh = 0
f) TE +PE + KE = 588 J
7) s = ut + 0.5*at^2
0.62 = 0 + 0.5*a*1^2
a = 1.24 m/s^2
F = ma = 85*1.24 = 105.4 N
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