in vertical, F_net = FN - Fg = 0
FN = 2 x 9.8 = 19.6 N ......Ans
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fk = uk N = 0.4 x 19.6 = 7.84 N ....Ans
(to the right)
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a = fk/m = 3.92 m/s^2 .....Ans
(to the right)
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vf = vi + a t
0 = - 10 + 3.92 t
t = 2.55 sec .....Ans
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vf^2 - vi^2 = 2 a d
0^2 - 10^2 = 2(-3.92) d
d = 12.8 m ........ANs
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