Question
a car travels at 60km/h is brought to rest over a distance of 100m. what is the acceleration? give the answer in m/s squared
Answers
GPT-5 mini
Use v^2 = v0^2 + 2aΔx with final v = 0.
Convert 60 km/h to m/s: 60 × (5/18) = 50/3 ≈ 16.6667 m/s.
a = (0 - (50/3)^2) / (2·100) = -2500/1800 = -25/18 ≈ -1.39 m/s^2.
So the acceleration is about -1.39 m/s^2 (negative = deceleration).
Convert 60 km/h to m/s: 60 × (5/18) = 50/3 ≈ 16.6667 m/s.
a = (0 - (50/3)^2) / (2·100) = -2500/1800 = -25/18 ≈ -1.39 m/s^2.
So the acceleration is about -1.39 m/s^2 (negative = deceleration).