Question

A boat takes off from the dock at 2.5 m/s and speeds up at 4.2 m/s2 for 6.0 s. How far has the boat traveled? Round your answer to the nearest whole number.

m

Answer 1

Use s = ut + 1/2 a t^2.

s = (2.5)(6.0) + 0.5(4.2)(6.0)^2 = 15 + 75.6 = 90.6 m ≈ 91 m.