Question

Margy is trying to improve her cardio endurance by performing an exercise in which she alternates walking and running 100.0 m each. If Margy is walking at 1.4 m/s and accelerates at 0.20 m/s2 during one of the running portions, what is her final velocity at the end of the 100.0 m? Round your answer to the nearest tenth.

m/s

Answer 1

Use v^2 = v0^2 + 2as.

v = sqrt(1.4^2 + 2(0.20)(100.0)) = sqrt(1.96 + 40.0) = sqrt(41.96) ≈ 6.5 m/s.