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

Question

20 November, 07:19

+1

Answers (1)

Know the Answer?

Katz · Answer 1

b. 67.2 m

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

2. A car traveling at 32m/sslams on the brakes after noticingan obstacle ahead. The car slowsdown at a constant rate beforecoming to a stop 4.2 secondslater. How far did the car travel inthe 4.2 seconds it took to stop?a. 7.6 mb. 67.2 mC. 86.4 md. 134.4 m