Time & distance

Question

Hello,

 

I would like to get a solution for this question please.

Convert the following to the units given :

160 km/hr to m/s. Give your answer to 2 decimal places.

 

 

Thank you in advance

Answer 1

To convert units without changing the value, we use the Multiplicative Identity (that is, 1).

 

This problem will use:

     1  =  (1000 m) / ( 1 km )                [or 1000 meters per kilometer]

     1  =  (1 hr) / (60 min)

     1  =  (1 min) / (60 sec)

 

Convert:

     160 km/hr

    ((160 km)/(1 hr))*1

    ((160 km)/(1 hr))*((1000 m)/(1 km))*((1 hr)/(60 min))*((1 min)/(60 sec))

    (160/1)*(100/1)*(1/60)*(1/60)    m/s        [note: km, hr, min all cancel out]

                    [also note:  I write this way to paste into MS Excel.]

      4.44 m/s