Posted by Edward on Tuesday, October 16, 2012 at 2:30am.
h = 5*sin20 = 1.71 m.
PE = mgh = 2100*9.8*1.71 = 35,192 J.
KE = PE-Fk*d.
0.5mV^2 = 35192 - 4000*5
1050V^2 = 15,192
V^2 = 14.47
V = 3.80 m/s.
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