W = mg 800 = m × 10 m = 80 kg = 80000 g

We know according to universal law of gravitation all the objects attract each other with same force. Hence, Gravitational force of earth on moon is equal to Gravitational force of moon on earth So, option 3 is correct

A person can carry 6 times heavier mass on moon as acceleration due to gravity on moon is 1/6 times to that on earth. So, weight they can carry together on moon = 6 × 27 = 162 kg

A person travelled from equator to poles, its weight will increase as gravity is more in poles.

Mass of Astronaut on moon= M g on moon = g on earth/6 = 9.8/6 =1.6 m/s² Weight on moon = 1.6 M Weight on earth = 9.8 M

Weight and mass are not same, so they are not interchangeable. So, Option 2 in incorrect A heavy object has more mass, not weight. So, Option 1 is eliminated. Therefore, option 4 is also eliminated. Weight is force and mass is a measure of inertia. So, option 3 is correct