Question

Mass of an object is 12kg. find its weight on the earth and on the moon
(Given that g on earth =10m/s2

Answer 1

weight=mg

=12*10=120kg

an object weighs six times lesser on the moon

so the weight of the object on the moon =120/6=20kg

Answer 2

Given: Mass of the object = 12kg

Acceleration due to gravity (g) on earth = 10 m/s²

To Find: Weight of the body on earth and moon

Solution:

We know that the value of acceleration due to gravity on the moon is 1/6 times its value on earth

g' = g / 6

g' = 10 / 6

   = 5 / 3 m/s²

The weight of an object on a planet is the force acting upon that object. The mass of the body is fixed and does not vary from one planet to another.

Force = mass x acceleration

At rest, the acceleration is only the acceleration due to gravity

Force on the surface of earth = Mass of the body x Acceleration due to gravity on earth

Force on the surface of earth =  12 x 10  

                                                  = 120 N

Force on the surface of the moon = Mass of the body x Acceleration due to gravity on the moon

Force on the surface of the moon =  12 x $\frac{5}{3}$

                                                         = 4 x 5

                                                         = 20 N

Therefore, the weight of the object on earth is 120N and on the moon is 20N.