Question

A stone 'X' of mass 2 kg is at the height of 2m from the ground level.Another similaar stone 'Y' of mass 4 kg is at the height of 4m from the ground level.What is the difference between their potential energy?​

Answer 1

Answer:

12O J ( BY TAKING G AS 10)

AND

117.6 J (BY TAKING G AS 9.8)

Explanation:

FOR POTENTIAL ENERGY OF X,

GIVEN,

MASS =2 KG

HEIGHT = 2m

G = 10

PE = MGH

PE = 2x2x10 = 40 JOULE

OR

IF WE TAKE G AS 9.8 THEN,

2x2x9.8 = 39.2 J

FOR POTENTIAL ENERGY OF Y,

GIVEN,

MASS = 4 KG

HEIGHT = 4m

G = 10

PE = MGH

PE = 4x4x10 = 160 JOULE

OR

IF WE TAKE G AS 9.8 THEN,

4x4x9.8 = 156.8

DIFFERENCE BETWEEN THEIR PE =

PE OF Y - PE OF X

= 160 J - 40 J = 120 J

OR

156.8 J - 39.2 J = 117.6 J

HOPE THE ANSWER HELPS YOU. :)