a girl having mass of 35 kg sit on a trolley of mass 5 kg the trolley is given an initial velocity of 4 m per second by applying a force. the trolley comes to rest after travelling a distance 16 m. find:
a) how much work is done by trolley.
b) how much work is done by girl.
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a) work done by the trolley =force *displacement. =(35 +5) *10*16. =400 *16=6400J. b) 350 *16 =5600J
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