Question

3. Express each of the following in m/s
(a) 1km/h (b) 18km/min
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Answer 1

(a)

1km/h = 0.277778m/s

1km = 1000m

1 hour = 3600s

1km/h = 1000/3600ms

= $\frac{5}{18}$m/s

= 0.277778m/s

(b)

18km/min

1km = 1000m

1 hour = 60min

18km/h = 1000/60 km/min

= $16\frac{40}{60}$m/s

= 16.6666666667m/s

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