Aplanet 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

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.