Sarthaks Test
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If the law of gravitation, instead of being inverse-square law, becomes an inverse-cube law- 

(a) planets will not have elliptic orbits. 

(b) circular orbits of planets is not possible. 

(c) projectile motion of a stone thrown by hand on the surface of the earth will be approximately parabolic. 

(d) there will be no gravitational force inside a spherical shell of uniform density.

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(a) planets will not have elliptic orbits. 

(c) projectile motion of a stone thrown by hand on the surface of the earth will be approximately parabolic. 

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