Gravity anything with mass as gravity we know the earth has gravity because you and i are standing on earth and not floating off into space when we jump we come right back to earth which model best represents the force of gravity pulling us all down to earth?

Explanation:

Close to Earth's surface, the force of gravity that pulls an object towards the ground is

(2)

where

m is the mass of the object

g is the acceleration due to gravity, which is close to Earth's surface

This is an approximation of the general formula of gravity valid only close to Earth's surface. The more general formula is

(1)

where

G is the gravitational constant

M is the Earth's mass

m is the object's mass

r is the distance of the object from Earth's center

At the Earth's surface,

r = R (Earth's radius), and by calling the following factor

we see that eq.(1) becomes eq.(2).

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.