calculate gravitational potential energy of a mass 2kg at height 2m on a planet whose mass is 5 times that of the earth and radius is same as that of the earth.(take g as 10m/s2)

Asked by rajanichandu.aeroit | 17th Feb, 2020, 07:27: PM

Expert Answer:

potential energy = m g' h  .........................(1)
where m is mass , g' is gravitational acceleration of the planet and h is distance above surface of planet.
 
g' = G M' /R2 = (5 G M) / R2 = 5 g = ( 5 × 10 ) m/s2 = 50 m/s2
 
where G is gravitational constant , M' is mass of the planet which is 5 times of mass of earth
 
hence potential energy = 2 × 50 × 2  = 200 J

Answered by Thiyagarajan K | 18th Feb, 2020, 07:32: AM

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