1. Acceleration due to Gravity

2. Galileo All objects fall towards Earth with a constant acceleration
If we ignore air friction, gravity accelerates all objects at the same rate
Gravity can change depending on altitude
Why does gravity decrease at higher altitudes?
Lunar Feather Drop

3. Acceleration due to Gravity
Acceleration due to gravity is symbolized as ‘g’
It is constant on Earth at 9.81 m/s² (on the back of your formula sheet)
When dealing with FALLING OBJECTS, all the formulas that we have used previously which contain acceleration can still be used. We simply substitute ‘a’ for ‘g’
Ex.

4. Position-Time Graph: Object Thrown Upwards

5. Velocity-Time Graph: Object Thrown Upwards

6. Sample Problem: A flowerpot falls from a ledge.
a) What is its velocity after 3.00 s?
b) How far does the pot fall during this time?

7. Sample Problem:
A large steel ball is dropped from a height of 7.00 m above a floor. With what velocity will the object strike the floor?

8. Sample Problem:
A cement block falls from the roof of a building. If the time of fall was 5.60s, what is the height of the building?

9. Sample Problem:
If you drop your pen from a height of 2.50 m above the floor, how long will it take to fall?

10. Sample Problem:
A tennis ball is thrown straight up with an initial velocity of m/s. The tennis ball is caught at the same height from which it was released.
a) How high does the ball rise?
b) How long does the ball remain in the air?

11. Sample Problem:
A space ship accelerates uniformly from m/s to m/s in s. How far does it move?

12. Homework
p. 19 #1-10

13. (Day #2) Homework
p. 21 #11-22
p. 24 #3-9, 11

14. (Day #3) Homework
p. 32 #1-21