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ANOBJECT OF MASS 40KG IS RAISED AT A HEIGHT OF 5M ABOVE THE GROUND . WHATIS ITS POTENTIAL ENERGY ? IF THE OBJECT IS ALLOWED TO FALL FIND ITS KINETIC ENERGY WHEN IT IS HALF WAY DOWN?
Asked by ashish | 08 Oct, 2019, 09:31: AM
Potential energy=mgh

Total energy =Potential energy +Kinetic energy
At the top
Total energy=Potential energy (KE=0)

At height h/2
PE = mgh/2

But we know that according to work energy theorem total Energy will remain constant

TE=PE+KE
mgh=mgh/2+KE
KE=mgh/2
KE=2000/2=1000J
Answered by Utkarsh Lokhande | 09 Oct, 2019, 10:59: AM

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