Question

2. A car traveling at 32m/s

slams on the brakes after noticing
an obstacle ahead. The car slows
down at a constant rate before
coming to a stop 4.2 seconds
later. How far did the car travel in
the 4.2 seconds it took to stop?
a. 7.6 m
b. 67.2 m
C. 86.4 m
d. 134.4 m​

Answer 1

b. 67.2 m

Step-by-step explanation:

Given:

v₀ = 32 m/s

v = 0 m/s

t = 4.2 s

Find: Δx

Δx = ½ (v + v₀) t

Δx = ½ (0 m/s + 32 m/s) (4.2 s)

Δx = 67.2 m