Free Fall Motion

What is Free Fall?

The motion of an object when gravity is the only significant force acting on it.

What is the acceleration due to gravity (g)?

g = -9.8 m/s², a constant acceleration due to the attractive force of gravity

Fill in the blank: All objects in Free Fall will accelerate at a constant rate of __________.

-9.8 m/s².

What is the first Free fall equation

Vf = Vi + gt

What is the second Free Fall equation?

Vf² = Vi² + 2gdy

What is the third Free Fall equation?

dy = Vi t + ½ g t².

In Case 1 of Free Fall (object dropped), what is the initial velocity (Viy)?

Zero, no direction (none).

In Case 1 of Free Fall (object dropped), what happens to the final velocity (Vfy)?

It increases, negative (downward).

In Case 1 of Free Fall (object dropped), what is the displacement (dy)?

It increases, negative (downward).

In Case 1, 2, & 3 of Free Fall, what is the acceleration (g)?

Constant, always negative

In Case 2 of Free Fall (object thrown downwards), what is the initial velocity (Viy)?

Greater than zero (Viy > 0), negative (downward).

. In Case 2 of Free Fall (object thrown downwards), what happens to the displacement (dy)?

It increases, negative (moving downward).

In Case 2 of Free Fall (object thrown downwards), what happens to the final velocity (Vfy)?

It increases, negative (speeding up downward).

In Case 3A of Free Fall (object thrown upwards), what is the initial velocity (Viy)?

Greater than zero (Viy > 0 m/s), positive (upward)

. In Case 3A of Free Fall (object thrown upwards), what happens to the final velocity (Vfy) before reaching maximum height?

It decreases, positive (slowing down while moving up).

n Case 3A of Free Fall (object thrown upwards), what is the final velocity (Vfy) at maximum height?

Zero, no direction (none).

In Case 3A of Free Fall (object thrown upwards), what happens to the displacement (dy)?

It decreases, positive (moving upward but slowing).

 In Case 3B of Free Fall (object thrown upwards then falls), what is the initial velocity (Viy max) at maximum height?

Zero, no direction (none).

In Case 3B of Free Fall (object thrown upwards then falls), what happens to the final velocity (Vfy) when falling from maximum height?

It increases, negative (speeding up downward).

In Case 3B of Free Fall (object thrown upwards then falls), what is the final velocity (Vfy) when back at the starting position?

It is equal to -Viy up, negative (same magnitude as initial velocity, but downward).

In Case 3B of Free Fall (object thrown upwards then falls), what happens to the displacement (dy)?

It increases, negative (moving downward).