Newton
What is rolling friction
the amount of molecules in an object
What is Mass
when two objects with smooth surfaces rub together
what is sliding friction?
the amount of gravity pulling down on an object
What is weight
when two objects have different surfaces and it is harder to push or pull
what is static friction?
when an object is falling through the air, and slows down because of the wind
what is fluid friction?
the rate of speed in the same direction
what is velocity
a feather falls slowly toward the ground, while a ball falls rapidly
what is fluid friction?