1. 2-7 Falling Objects - Demos/discussion - free fall (if available)
In the absence of air resistance, all objects fall with the same acceleration, although this may be hard to tell by testing in an environment where there is air resistance.

2. 2-7 Falling Objects
Near the surface of the Earth, all objects experience approximately the same acceleration due to gravity.
This is one of the most common examples of motion with constant acceleration.

3. 2-7 Falling Objects
The acceleration due to gravity at the Earth’s surface is approximately 9.80 m/s2.

4. “New” old formulas:

5. On other planets, the gravitational acceleration is different but still constant:
Moon: a = 1.62 m/s/s downward
Mars: a = … try to find it from the following simulation:
Free fall on Mars
Other examples on OneNote or board

6. Help me make up and solve a problem:
A gourmand student, in trying to impress his girlfriend, throws a small and sweet cookie straight upwards from an initial height of … m (his hand level) at a velocity of … m/s. He catches the cookie in his mouth on its way down (height of … m). Find (for the cookie):
The maximum height reached
The time it takes to the highest position
Total time of flight
Final velocity, just before it touches the student’s tongue
The age of the student