Question

When a car driver travelling at a speed of 30m/s applies brakes and brings the car to rest in 20s, then the acceleration will be:

Select one:
a. − 1.5 m/s2
b. +1.5 m/s2
c. − 0.67 m/s2
d. + 0.67 m/s2

Answer 1

Answer:

here here we know that acceleration formula.

a=v-u/t so

Explanation:

by this formula

30-0/20=30/30=3/2m/s*2