a car moves with a speed of 30 km/h for half an hour , 25 km/h for 1 hour and 40 km/h for 2 hours capculate the average speed of the car
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Answered by
1
Avg. speed = (Total distance travelled by the body) / (Total time taken to travel that that distance)
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here the parallel line will intersect y axis at 1 and run parallel to x asis till the mark 2min in the accl vs time hraph
so the speed aquired = accl × time= 1m/s^2× (2×60)sec=120m/s
and distance travelled = speed × time = 120m/s × (2×60)s = 14400m
hope it helps....
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Answered by
3
Distance covered in first 1/2 hour
=30×1/2
=15km
in next 1 hour
=25×1
=25km
in last 2 hour
=40×2
=80km
Total distance covered
=15+25+80
=120km
Time taken
=1+2+0.5
=3.5hours
Average speed
=Total distance/Time taken
=120/3.5
=34.285km/h
=30×1/2
=15km
in next 1 hour
=25×1
=25km
in last 2 hour
=40×2
=80km
Total distance covered
=15+25+80
=120km
Time taken
=1+2+0.5
=3.5hours
Average speed
=Total distance/Time taken
=120/3.5
=34.285km/h
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