Question

How long does it take to accelerate from 8.0 m/s to 20.0 m/s at a rate of acceleration of 3.0 m/s2?

Question 17 options:

4.0 s


0.25 s


36 s


9.33 s

Answer 1

t = 4.0 s

Step-by-step explanation:

Given:

V₁ = 8.0 m/s

V₂ = 20.0 m/s

a =3.0 m/c²

______________

t - ?

a = ( V₂ - V₁ ) / t

t = ( V₂ - V₁ ) / a

t = ( 20.0 - 8.0 )/ 3.0 = 12.0 /3.0 = 4.0 s

Answer 2

4.0s

Step-by-step explanation:

v = v_0 + a*t -> t = (v - v_0) / a

v = 20.0m/s, v_0 = 8.0 m/s, a = 3.0 m/s^2

t = (20.0 - 8.0) / 3.0 = 4.0s