17) Apply this equation to calculate the acceleration of the car:
a = Δv/Δt
a = acceleration, Δv = change in velocity, Δt = elapsed time
Given values:
Δv = 80m/s - 110m/s = -30m/s, Δt = 20s
Plug in and solve for a:
a = -30/20
a = -1.5m/s²
18) Rearrange the acceleration equation:
Δv = aΔt
Given values:
Δv = 40m/s, 5m/s²
Plug in and solve for Δt:
40 = 5Δt
Δt = 8s