Question

If the distance between the sun and the earth is made three times, then attraction between the two will ______

Options

• remain constant

• decrease by 63%

• decrease by 83%

• decrease by 89%

Answer 1

If the distance between the sun and the earth is made three times, then attraction between the two will decrease by 89%.

Explanation:

F = Gm₁m₂/r² and

F' = Gm₁m₂/(3r)² = F/9 

∴ % decrease in F' = `(("F" - "F"^')/("F"))xx 100`

= `8/9 xx 100 = 89%`