Question

A planet is discovered that is the same size as Earth and has the same gravitational acceleration, but it has twice the mass. If you weigh 700 N on Earth, on the new planet you would weigh ____. (1 point)
350 N
700 N
1,400 N
2,800 N

Answer 1

The formula for force is mass multiplied with acceleration due to gravity. First, we find the mass, which is constant no matter where your are.

F = mg
700 = m * 9.81
m = 71.36 kg

Twice of this mass is 142.71 kg. Now, we use this mass to calculate the force or the weight. 

F = 142.71 kg * 9.81 m/s^2
F = 1,400 N

Thus, the answer is 1,400 N.