Question

A driver starts his parked car and within 5 seconds reaches a speed of 60 km/h, as he travels east. What is his acceleration?

Answer 1

Acceleration is the change in velocity over a period of time.

\(\large a=\dfrac{v_f-v_i}{t_f-t_i}\)

Answer 2

\[a=\frac{ o-60 }{ 5 }\]

Answer 3

is this right

Answer 4

the subscript "f" means final and the "i" initial. So it should be:

\(a=\dfrac{60~km/h-0~km/h}{5~s-0~s}\)

Answer 5

\[a=12km/h ^{2}\]

Answer 6

right

Answer 7

you'd have to convert sec to h or h to sec