Question

What is the weight of a 700 g of body on a planet whose mass is 1/7th of that of earth and radius is 1/2 of earth ?

Answer 1

Here, mass of body , m = 700 g = 0.7 kg

w=m g [w = weight of planet ; M= mass of earth;

g= GM/R^2 R=radius of earth; g= accelation due to gravity ;

Mx = M/7 Mx= mass of the mentioned planet;

Rx= R/2 Rx = radius of the mentioned planet;

so, gx = (GM x 4)/R^2 x 7 gx = acceleration due to gravity on the mentioned

so w= 0.7 x gx planet]