Answer :
Decrease
Newton (N) is the Unit of force. And 1 N is the force needed to accelerate 1 kilogram of mass at the rate of 1 meter/second..
In earth; 1 kg mass produce 9.81 N force in direction to the center of gravity of earth. In an other words, if mass produce 9.81 N force in earth that mass is must be 1 kg.
In your question; 600 N force is always 600N force.
When you measure the force of mass is 600 N on earth, same mass is produce 600x(1.62/9.81) = 99.08 N on Moon, and 600x(3.71/9,81)= 226.91 N on Mars.
Find out more about earth's surface
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