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20. A spherical planet far out in space has mass 2M and radiusa. A particle of mass m is falling freely near its surface. Whatwill be the acceleration of that particle?

Answer»

As we know g = GM/R²R= aso,g = GM/ (a)²= GM/ a²

so as the mass of the planet =2 Mdiameter = 2athan g = 2GM/ a^2



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