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ICSE Class 10 Answered

A train of mass 160000 kg is moving on a level track at 54 km per hour if the frictional resistance to the motion is 5kgf per 1000 kg what is the power developed by engine
Asked by Samrat | 30 Jun, 2018, 07:07: PM
answered-by-expert Expert Answer
frictional resistance = 5 kgf / 1000 kg 
 
frictional force for 160000 kg = 5 × 9.8 × (160000 / 1000 ) = 5 × 9.8 × 160 = 7840 N
 
speed = 54 km/hr = 54×(5/18) = 15 m/s
 
power = force×speed = 7840×15 = 117.6 kW
Answered by Thiyagarajan K | 02 Jul, 2018, 02:35: PM

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