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ICSE Class 10 Answered

how to find the displacement
Asked by nilesh.dhote74 | 28 Apr, 2020, 10:10: PM
Expert Answer
T r u c k space w e i g h i n g space 1000 space k g f space c h a n g e s space s p e e d space f r o m space 36 space k m divided by h space t o space 72 space k m divided by h space i n space 2 space m i n u t e s.
u space equals space 36 space k m divided by h space equals space fraction numerator 36 space cross times space 1000 over denominator 3600 end fraction space equals space 10 space m divided by s space
a n d space v space equals space 72 space k m divided by h space equals space 20 space m divided by s space
m a s s space o f space t r u c k space equals space 1000 space k g space

W space space equals space 1 half cross times 1000 space cross times space open parentheses 20 squared space minus space 10 squared close parentheses space space equals space 150000 space J space
T h u s comma space
W space space equals space 1.5 space cross times 10 to the power of 5 space J space

P o w e r space equals space fraction numerator W o r k space d o n e over denominator t i m e space t a k e n space end fraction space equals space fraction numerator 1.5 cross times 10 to the power of 5 over denominator 120 end fraction space equals space 1.25 space cross times space 10 cubed space W space
Answered by Shiwani Sawant | 28 Apr, 2020, 11:12: PM
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