A person of mass 50kg carrying a load of 20kg walks up a staircase .if the width and heigth of each step are 0.2m and 0.2m respectively,the work done by the man in walking up 20 steps is (g= 10ms)

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A person of mass 50kg carrying a load of 20kg walks up a staircase .if the width and heigth of each step are 0.2m and 0.2m respectively,the work done by the man in walking up 20 steps is (g= 10ms)

vishnuvardhanmiryala 23rd Sep, 2020

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Tunir Sikdar 2nd Nov, 2020

Hi,

A person of mass 50kg carrying a load of 20kg walks up to a staircase. If the width and height of each step are 0.2m and 0.2m respectively,

Total mass (m)=50kg + 20kg =70kg

Heighth (h)=20×0.2=4m

The work done her is the potential energy=mgh=70×10×4=2800 J

Hope this helps!

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