Question

if two persons a and b take 2 second and 4 second respectively to lift an object to the same height h, then the ratio of their potential energies at highest point​

Answer 1

Answer: 1:1

Explanation: as the potential energy

U = mgh which does not depend on time as per the formula ... here mass is constant, acceleration due to gravity is constant and height is same so 1:1

We can also do this by law of conservative forces ... as potential is a conservative force it does not depend on time

Hope this helps !!

Answer 2

2:1 ratio

Explanation:

P=mgh/t

so P =1/T ie.P is inversely proportional to Time t

Pa/Pb=Tb/Ta

=4/2

=2:1