1.Sitting cross-legged on the ground II. Lying horizontally flat on the ground
III. Standing on both feet and not moving
IV. Seated motionless on a rocking chair with both feet on the ground

Gravitational potential energy is the energy stored in a body due to its heightfrom the ground. The amount of gravitational potential energy a person has depends on the distance of his centre of mass from the ground. Given that a person's centre of mass is at his navel (just below his stomach), arrange the
positions, I, II, III and IV, in the order that will give the person an increasing
gravitational potential energy.
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