Kevin W. answered • 11/08/20
Tutor
4.7
(28)
Very Strong in Algebra, Algebra 2, Chemistry, Physics
Knowns:
mass = 17,600-kg
vi = 0 m/s
vf = 68 m/s
t = 2.6 s.
Unknowns:
a = ? m/s2
a = ? g's
d = ? m
F = ? N
Analysis: From the kinematic equations you know:
a = (vf - vi) / t --> (68 m/s - 0 m/s) / 2.6 s = 26.1538 m/s2 Significant Figures 26 m/s2
g's = a / g --> 26 m/s2/9.8 m/s2 = 2.66876 Significant Figures 2.7 g's
d = vi t + 1/2 a t2 --> 0m/s*2.6s + 0.5*26m/s2*(2.6s)2 = 87.88 m Significant Figures 88 m
F = ma --> 17600 kg * 26 m/s2 = 457600 N Significant Figures 460,000 N
Sandra W.
for d=?m what did you do to get 87.88 I am taking a phicis class for the first time in my life and looking at what you did I do understand because it looks complicated with 0m/s*2.6s + 0.5*26m/s2*(2.6s)2... on my question I found my m/s2, g's, and my N but my m I am having a hard time.01/24/22