Question

If radius of body on surface of earth is contracted by 2 percent and its mass remains constant then what happen to its weight either decrease or increase?

Answer 1

answer : weight of body remains constant

explanation : a/c to question, if the radius of body on the surface of earth is contracted by 2% and its mass remains constant. then weight of body doesn't change.

it is because , weight of body depends on mass of body and acceleration due to gravity.

if mass of body remains constant and acceleration due to gravity doesn't change (because question doesn't say about changing of earth's radius or anything else. )

[ note : when earth is contracted by 2% then, acceleration due to gravity changes by 4% (increases). because g is inversely proportional to r² . then, weight of body is increased by 4% ]