Physics 2.4 Free Fall

What is free fall?

A condition in which gravity is the only force acting on an object, causing it to accelerate at 9.8 m^/s2 downward.

When is the acceleration zero for an object in free fall?

Never

What formulas can be used to solve for free fall?

d = 1⁄2 (vi + vf) t

vf = vi + at

d = vi(t) + 1⁄2 at2

vf2 = vi2 + 2ad

What does vector contain?

magnitude AND direction

What is velocity vs acceleration?

Velocity is the rate of change of the displacement of an object, whereas acceleration is the rate of change of its velocity.

What does vf represent?

Final velocity. Where the object ends up.

What does vi represent?

Initial velocity. Where the object starts initially.

When is velocity zero?

At the peak of its notion