Runner can run 200 metres in 25 seconds. Find his speed in m/s
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⭕️The speed is the distance travelled divided by the time spent.
(200 meters) / (25 seconds) = 8 m/s.
⭕️in kilometers per second, let's convert meters in kilometers and seconds in hours.
⭕️There are 1000 meters in 1 km so 1/1000 km in 1 m.
⭕️There are 60 seconds in one minute and 60 minutes in one hour
so 60*60 = 3600 seconds in one hour.
⭕️Or 1/3600 hours in one second.
substitute for 8 m/s:
8 meters/seconds
= 8 (1/1000 kilometers) / (1/3600 hours)
= 8x1/1000÷3600
=8x3600/1000
=3x3.6
=28.8km/hr
(200 meters) / (25 seconds) = 8 m/s.
⭕️in kilometers per second, let's convert meters in kilometers and seconds in hours.
⭕️There are 1000 meters in 1 km so 1/1000 km in 1 m.
⭕️There are 60 seconds in one minute and 60 minutes in one hour
so 60*60 = 3600 seconds in one hour.
⭕️Or 1/3600 hours in one second.
substitute for 8 m/s:
8 meters/seconds
= 8 (1/1000 kilometers) / (1/3600 hours)
= 8x1/1000÷3600
=8x3600/1000
=3x3.6
=28.8km/hr
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