1

**Physics, Astronomy & Cosmology / Re: Why are inertial mass and gravitational mass the same? **

« **on:**

**Today**at 16:54:04 »

Since in a gravitational field, weight is the same as mass, this seems to be a self-defeating explanation.

Not really, as gravitational fields come in different strengths. Your weight on Earth is different than your weight on Mars, whereas the mass is the same on both planets.

Why do objects in free fall within the earth’s gravitational influence, still fall to earth with an acceleration of 9.8 m/s2 even though there is apparently no force acting on them.

There is a force acting on them.

The inertial mass exactly matching the gravitational mass, the two masses should cancel each other out

That's not how math works. Two equal numbers adding together do not sum to zero (unless the numbers you started with were zeros).

leaving a net zero force acting on them

The only way that could be true would be if one mass was somehow creating a force equal to, but opposite in sign, to the other. That's not the case.

Why don’t objects dropped from a height just float instead? This is what happens in the space station where almost zero gravity is experienced.

Not really. Objects in orbit are in freefall. They are not floating.