"It is assumed that the potential energy of objects located at" "ground level is zero."
"If the object is higher than the ground level, it gains potential energy".
"We can calculate the potential energy of objects above ground" "level using the equation given below."
E_p=m g h
"Where m:mass of object , h:height from ground level"
E_p=5*9.81*2
E_p=98.1J
"A change in potential energy means that there is work done."
"Work=change in potential energy"
"Work" rArr" "W=98.1J