Answer to Question #15259 in Mechanics | Relativity for Amy
V = -5.50[m/s²]*4.35[s] = -23.925 m/s.
Let's find the initial speed V0 of a car. We know that
V0*4.35[s] - 5.50[m/s²]*(4.35[s])²/2 = 63.0[m],
V0 = (63.0[m] + 5.50[m/s²]*(4.35[s])²/2) / 4.35[s] ≈ 26.445 m/s
and the car strikes the tree with the speed of
V0 + V = 26.445[m/s] - 23.925[m/s] = 2.520 m/s.
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