Question

A car from the beginning was traveling at 27.8m/s when he stepped on the brakes and stopped. According to the DMV, this would leave a skid mark of 60m. What is his acceleration?

Answer 1

-6.44 m/s²

Step-by-step explanation:

Given:

Δx = 60 m

v₀ = 27.8 m/s

v = 0 m/s

Find: a

v² = v₀² + 2aΔx

(0 m/s)² = (27.8 m/s)² + 2a (60 m)

a = -6.44 m/s²