When the distance between the two stars decreases by half, the force between the

Question

When the distance between the two stars decreases by half, the force between them A) decreases by one quarter B) decreases by on half C) increases by twice as much D) increases to four times as much E) stay the same *And Why? When the distance between the two stars decreases by half, the force between them A) decreases by one quarter B) decreases by on half C) increases by twice as much D) increases to four times as much E) stay the same *And Why? A) decreases by one quarter B) decreases by on half C) increases by twice as much D) increases to four times as much E) stay the same *And Why?

Explanation / Answer

Gravitational force between two masses,

Fg = G m1 m2 / d^2

now d is halved.

Fg' = G m1 m2 / (d/2)^2 = 4 G m1 m2 / d^2 = 4 Fg

increase to 4 times

Ans(D)

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