True or false?
gravity is everywhere in the universe, therefore there is no such thing as zero gravity.

That's true.
Newton's law of universal gravitation says that the gravitational
force between two objects is

                      F  =  G · M₁ · M₂ / D²  .

There's no note under the equation that says "only up to
this certain distance, and zero any farther than that".

The equation is true no matter how gigantic the distance
is between the objects.

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.