Question

A car traveling at a speed of 30.0 m/s encounters an emergency and comes to a complete stop. How much time will it take for the car to stop if it decelerates at 4.0 m/s2? (Time is always position

Answer 1

7.5 secs

Step-by-step explanation:

a= -4m/s2

v= 0

u=30 m/s

a=(v-u)/t

-4= (0-30)/t

t= -30/-4

=7.5 secs