1.

A solid sphere of uniform density and radius R applies a gravitational force of attraction = F1 on a particle placed at a distance of 2R from the centre of the sphere . A spherical cavity of radius R/2 is now made in the sphere which applies a force F2 on the same particle, Find FI/F2.

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thanks but i have not studied the concept of positive and negative mass so if u could please do it another way it would be appreciated



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