Asked by Anonymous

A car enters the freeway with a speed of 6.5
m/s and accelerates uniformly for 3.5 km in
3.9 min.
How fast is the car moving after this time?
Answer in units of m/s.
Answered by Damon
3500 = 0 + 6.5 t + (1/2)a t^2
but t = 3.9*60 = 234 seconds
3500 = 6.5 * 234 + (1/2) a (234^2)
3500 = 1521 + 27378 a
a = .0723 m/s^2

v = Vi + a t
v = 6.5 + .0723 * 234
= 6.5+16.9 = 23.4 m/s
Answered by Rajal
A car enters the freeway with a speed of 5.6 m/s and accelerates uniformly for 2.7 km in 3.0 min. How fast is the car moving after this time? Answer in units of m/s
Answered by bb
212
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