Answer:
5 Joules, 7.5 Joules and 10 Joules respectively
Explanation:
Potential energy due to gravity is given by mass*gravity*height or weight*height(As weight= mass*gravity)
The potential energy at the height of 1 meters = 5*1 = 5 Joules
The potential energy at the height of 1.5 meters = 5*1.5 = 7.5 Joules
The potential energy at the height of 2 meters = 5*2 = 10 Joules
