2- an object has a mass of 250 g. what is the gravitational force of on the object by the earth?

Weight = (mass) x (acceleration of gravity)

Acceleration of gravity on Earth = 9.8 m/s²

Weight = (0.25 kg) x (9.8 m/s²) = 2.45 newtons .

Th object is attracted toward the Earth with a force of
2.45 newtons, AND the Earth is attracted toward the object
with a force of 2.45 newtons.  The object's weight on Earth
is equal to Earth's weight on the object.

    5.5 n======    assuming that      we have      m = 0.145 kg    a = 38 m/s²therefore    5.51 n, but two significant figures.final answer: 5.5 n

You yeah with the side of the yeah with a little bit of yeah.