Answer:
24.1 m/s
Explanation:
Using newton's equation of motion,
s = (v+u)t/2 .............................. Equation 1
Where s = distance, v = Final velocity, u = initial velocity, t = time.
making v the subject of the equation,
v = (2s/t)-u........................... Equation 2
Given: s = 3.2 km= ( 3.2×1000) m = 3200 m , t = 3.5 min = (35× 60 ) s = 210 s, u = 6.4 m/s.
substitute into equation 2
v = (2×3200/210)-6.4
v = 24.076 m/s
v ≈ 24.1 m/s
