Question

A ball of mass 200g falls from a height of 5 metres. what is its kinetic energy when it just reached?​

Answer 1

so the right answer is that P.E = mass*acceleration due to gravity*height

mass= 0.2kg(as mass can never be in gram) , g= 9.8ms-1, h=5m

potential energy = 0.2kg * 9.8*5 = 9.8( if u take g as 10 answer = 10)

as kinetic energy conserved = potential energy kinetic energy = 9.8 or 10