Question

1. What is the acceleration of a car that takes 8.5 seconds to change its velocity from 35 m/s to 5 m/s?

Knowns:
Unknowns:
Formula:
Solve:

Answer 1

Final velocity(v)= 25m/s^2

Initial velocity(u)=10m/s^2

Acceleration(a)=5m/s^2

let time taken be t sec

From first eq of motion

v=u+at

v-u=at

25–10=5t

15=5t

t=3s.