Question

You are driving down the road at 35 mph. what is your speed in m/s?

Answer 1

15.64m/s

Step-by-step explanation:

This is a unit of speed which is the rate of change of distance with time

I am driving at 35mph: and I want to express as m/s

mph means miles per hour

This suggests that I have to convert miles to m and hrs to secs:

for distance 1.609km = 1mi

1000m = 1km

for time:

1hr = 60minutes

1min = 60seconds

Using dimensional analysis:

`(35miles)/(1hour)` x
`(1.609km)/(1miles)` x
`(1000m)/(1km)` x
`(1hour)/(60min)` x
`(1min)/(60seconds)`

= 15.64m/s