50kg here is 18.85kg on Mars.
About 19 pounds
About 2 times less, so if you weigh 50 pounds on Earth, you would weigh about 18(mars is a bit less massive than half the size of earth) on Mars.
50 newtons
about 50 years
You would weigh 57 pounds.
54 pounds on Saturn.
too much
19 pounds on Mars.
301 pounds.
If your mass is 50 kg, then you weigh about 18 pounds on the moon, about 39.6 pounds on Mars, about 110 pounds on earth, and exactly zero while you're coasting through space at constant speed on your way from one of them to another. Your 50kg doesn't change. That's your 'mass', not your weight.
About 301.5 pounds
The gravitational kinetic speed for Earth is: 9.8 m/s^2 \ 9.8 -/+.5 m/sec^2The gravitational kinetic speed for Mars is: 3.69 m/sec^2 \ 3.79-/+.5 m/sec^2So, let's say something like this:K = UJK is the weight,U = 50 kgJ = (3.69 m/sec^2 \ 3.79-/+.5 m/sec^2)K = (50 kg)*(3.69 m/sec^2 \ 3.79-/+.5 m/sec^2)K = 184.5 NewtonsSo, your weight on Mars would be: 184.5 Newtons.