Question 29:
If a sprinter runs a distance of 100 metres in 9.83 seconds, calculate his average speed in km/h.
Lakhmir Singh Physics Class 9
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Distance = 100 m
Time = 9.83
Speed = distance / time
= 100 / 9.83m/sec
To convert the speed from m/sec to km/hr
( 100/1000 ) / ( 9.83/60 ×60 )
0.1/0.0027 = 37.03 km/hr .
Time = 9.83
Speed = distance / time
= 100 / 9.83m/sec
To convert the speed from m/sec to km/hr
( 100/1000 ) / ( 9.83/60 ×60 )
0.1/0.0027 = 37.03 km/hr .
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