Question

A car travels in a straight line for 5 h at a constant speed of 72 km/h. What is it’s acceleration

Answer 1

`a \approx \: 0.001 \: m {s}^( - 2)`

Step-by-step explanation:

Given:

`initial \: velocity \: (u) = 0 \\ \\ </p><p>Final \: Velocity \: (v) = 72 km /h \\ \\ </p><p>Time \: (t) = 5 \: hours \\ \\ </p><p>Acceleration \: (a) =? \\ \\ </p><p> \because \: a = (v - u)/(t) \\ \\ \therefore \: a = (72 - 0)/(5) \\ \\ a = (72)/(5) \\ \\ a = 14.5 \: km {h}^( - 2) \\ \\ a = (14.5 * 1000)/(3600* 3600) \: m {s}^( - 2) \\ \\ a = 0.00111882716 \\ \\ a \approx \: 0.001 \: m {s}^( - 2)`