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A girl having a mass of 25 kg on a trolley of mass 5kg a trolley is given an initial velocity of 4 m per second by applying a force full stop the trolley comes to rest after travelling a distance of 16m .(a) how much work is done on the trolley. (b) how much work is done by a girl?
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A girl having a mass of 25 kg on a trolley of mass 5kg a trolley is gi...
Mass of girl = 25 kg 
Mass of trolley = 5 kg 
Total mass, m = (25 + 5) = 30 kg. 
Now,we have- 
u = 4 m/s 
v = 0 
s = 16 m 
By equation,we have the following: 
v 2 = u 2 + 2as 0 
= (4)2 + 2a (16) 32a 
= –16 a = –0.5 m/s2
Force exerted on trolley, F = mass* acceleration 
= 30*0.5
= 15 N 
Work done on trolley W = FS 
=15 N x 16 m 
= 240 Joules. 
Work done by the girl, W = FS = mass of girl * retardation * S 
= 25 * 0.5 * 16 
= 200 Joules.


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A girl having a mass of 25 kg on a trolley of mass 5kg a trolley is given an initial velocity of 4 m per second by applying a force full stop the trolley comes to rest after travelling a distance of 16m .(a) how much work is done on the trolley. (b) how much work is done by a girl?
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A girl having a mass of 25 kg on a trolley of mass 5kg a trolley is given an initial velocity of 4 m per second by applying a force full stop the trolley comes to rest after travelling a distance of 16m .(a) how much work is done on the trolley. (b) how much work is done by a girl? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about A girl having a mass of 25 kg on a trolley of mass 5kg a trolley is given an initial velocity of 4 m per second by applying a force full stop the trolley comes to rest after travelling a distance of 16m .(a) how much work is done on the trolley. (b) how much work is done by a girl? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A girl having a mass of 25 kg on a trolley of mass 5kg a trolley is given an initial velocity of 4 m per second by applying a force full stop the trolley comes to rest after travelling a distance of 16m .(a) how much work is done on the trolley. (b) how much work is done by a girl?.
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