%253Cp%253E%253Cspan%2520class%253D%2522Apple-style-span%2522%2526nbsp%253Bstyle
ID: 2275349 • Letter: #
Question
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/ Answer
s = ut+0..5at^2
u = 0 here
so
dh= 0.5*(2.8*t)*t^2 dt
integrate from 0 to 10
h = 1.4*t^4/4 from 0 to 10
h = 1.4*(10)^4/4 = 3500 m ----ANSWER for A
B)
300 = 1.4*t^4/4
t = 5.41 sec
V = u+at
dv = 0+ (2.8*t)*t dt
integrate from 0 to 5.41
v = 2.8*t^3/3 from 0 to 5.41
V = 147.78 m/s -------------ANSWER for B
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