A truck pulls a trailer at 75km/h and exert a uniform pulling force of 800n on the trailer .calculate the work done by the trailer im 30min?
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Time = 1800 s
speed = 20.83m/s
Speed = Distance travelled / Time taken
20.83 = s/1800
=37494 m
Work done=Force × displacement
=800x 37494
=29995200 Joule
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