Question

If mass of earth decreases by 25% and its radius increases by 50%, then acceleration due to gravity at the
surface decreases by nearly
(1) 89%
(2) 67%
(3) 33%
(4) 11%

step by step instructions needed!!​

Answer 1

Answer 66 %

g = Gm/ r²

New accleration due to gravity be l

L= G 75m/100×(1.5 r²)

Canceling we get l = 33g

So decrease in g is 67 % .

:-)