Question

There are 2 cars that are getting ready to race. After sitting at a stoplight for 30 seconds, the light turns green and they begin to accelerate at a rate of 4m/s2. The cars were neck and neck the whole way after traveling 150 meters. How long did it take them to travel that 150 meters?

Answer 1

75seconds

Step-by-step explanation:

Given that the acceleration of the car is

a=4m/s^2

and also the distance covered is

d=150m

from the problem "The cars were neck and neck the whole way after traveling 150 meters"

this means velocity was constant throughout

s=ut+1/2at

150=0*t+4t/2

150=2t

divide both sides by 2

t=150/2

t=75seconds