A bar graph titled Acceleration versus Mass with Mass in kilograms on the x axis with labels 2, 4, and 6. Acceleration in meters per second squared is on the y axis numbered 0 to 16. The low bar goes up to 8.5, the medium bar goes up to 12, and the high bar goes up to 14. The graph shows the acceleration of the cart as the mass of the cart varies.

As the mass of the cart increases, the acceleration of the cart
.

The type of relationship that exists between the mass of the cart and the acceleration of the cart is
relationship.

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.