The video shows a collapsing cloud of interstellar gas, which is held together by the mutual gravitational attraction of all the atoms and molecules that make up the cloud. as the cloud collapses, the overall force of gravity draws the cloud inward because
(blank 1) gradually becomes stronger
(blank 1) gradually becomes weaker
(blank 1) stays constant at all times
(blank 2) the strength of gravity follows an inverse square law with distance
(blank 2) the mass of the cloud increases as it collapses
(blank 2) the total gravitational force is a conserved quantity

the overall force of gravity draws the cloud inward gradually becomes stronger because the strength of gravity follows an inverse square law with distance

Explanation:

gravity is stronger the closer the two objects are, the formula is

G * M1 * M2 / r^2

G being a constant, M1 and M2 being the mass of the two objects and r being the distance between them

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.