An object slows with an acceleration of – 2.0 m/s2. If the object starts with a velocity of 20 m/s, how long will it take to come to a stop?

Answer 1

a = Δv/Δt, or Δt = Δv/a

Δv = v₂-v₁ = 0 m/s - 20 m/s = -20 m/s

Δt = (-20 m/s) / (-2 m/s²) = 10 s