physics force unit

Question

A brick is placed on a balance and is found to have a mass of 5.0 kg. When the same brick is hung on a Newton spring scale it causes a reading of 49.0 N. The balance, spring scale, and brick are transported to a planet where the gravitational field intensity is two times that on Earth. On this planet the reading on the balance will be ___________ and the reading on the spring scale will be ___________.

Answer 1

The mass of the object stays the same no matter what intensity the gravitational field is, which means that on the second planet, the mass of the brick is still 5 kg. However, the gravitational force as measured by the spring scale is W = mg, so if g doubles, W must also double, making the gravitational force equal to 98 N.

Answer 2

m = 5kg and P = 98 N