Question

A planet whose size is the same and mass 5times as that
of earth. Find the amount of energy
needed to lift a 5kg mass
vertically
upwards to 4 mtr distance on the planet​

Answer 1

Answer:

Hii ☃

Explanation:

The acceleration due to gravity is given by g=GMR2. So in the other planet the acceleration due to gravity is given by

g'=G4MR2=4GMR2=4g

So energy to lift 2 kg mass to 2 m height is given by

Ep=mg'h=2×4g×2=2×4×10×2=160 J