Gravity

Gravity & Falling

EVERYTHING made of matter has gravity (even you!) The more matter (mass), the stronger your gravitational pull.
Earth's gravity causes a constant acceleration of 9.8 m/s/s
What force causes a change in Earth's direction (acceleration) so that it's path is not a straight line? The Sun's gravity!

Falling Objects: Gravity vs. Fluid Friction Force (of air)

All objects fall at the same rate. HOWEVER, air pushes falling objects up due to the fluid force of friction.
The faster something is falling, the higher an objects Fluid Force.
Terminal Velocity is the speed an object fallsat where the force of the air (Fluid Force) equals the force of gravity (g) causing the Net Force to be 0. This means it is no longer accelerating. This means it will go at a constant velocity which is called the terminal velocity.

What happens when we get rid of the air? (No more Fluid Friction Force!!)

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