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Scarlet_pat
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Homework Statement
in the absense of bearing friction a winding engine would raise a cage weighing 1000 kg at 10m/s, but this is reduced by friction to 9 m/s, how much oil, initially at 20 C is required per second to keep the temperature of the bearing down to 70 C
(specific heat capacity of oil is 2100 J/Kg K , g = 9.81 )
Homework Equations
heat energy = mass x specific heat capacity x change of temperature
The Attempt at a Solution
i personally do not know how to attempt this question, i was trying to see if there is any relationship between velocity and energy, but i couldn't find anything. please .. help