A trolley runs from P to Q along a track. At Q its potential energy is 50 kJ less than at P.At P, the kinetic energy of the trolley is 5 kJ. Between P and Q the work the trolley does againstfriction is 10 kJ.What is the kinetic energy of the trolley at Q?

1 )
35 kJ3 )
55 kJ4 )
65 kJتحلیل ویدئویی تست
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