20. tan(theta) = 0.14
theta = 7.97 deg
(A) along the incline, Fnet = m g sin(theta) ....down the
incline
a = F / m = g sin7.97
a = 9.8 x sin7.97 = 1.36 m/s^2 (down the incline)
(B) Applying vf^2 - vi^2 = 2 a d
v^2 - 10^2 = 2(1.36)(300)
v = 30.25 m/s
(c) vf = vi + a t
30.25 = 10 + 1.36 t
t = 14.9 sec
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