Question

approaching a dangerous intersection the driver slows her car from 40 meters per second to 15 meters per second in 5 seconds what is the acceleration ​

Answer 1

- 5 m/s^2

Step-by-step explanation:

Givens

vi = 40 m/s

vf = 15 m/s

t = 5 seconds

Formula

a = (vf - vi)/t

a = (15 - 40)/5

a = -25/5

a = - 5 m/s^2

Don't be bothered by the minus sign. It just means she is slowing down.