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1. d = rt d = 6 m r = 3*10^8 m/s t is what you want to find t = 2*10^-8 sec. 2. KE = (1/2) mv^2 m = 1 kg v^2 = v0^2 + 2ax v = sqrt(2*9.8*20) = 19.8 m/s KE = (1/2) (1 kg) (19.8 m/s)^2 = 196 J

v = v_init + acc * time acc = 205 m/s^2 time = 2.9 sec v_init = 0 v = (205 m/s^2) (2.9 sec) = 594.5 m/s The bolt will have traveled (1/2)(205 m/s^2) (2.9 sec) ^2 = 862.03 m.