1. Q2:
Calculate the average
speed at 2 hours.
As he entered the
last lap of the race, Daniel was driving 24.6 m/s. Thirty seconds later he crossed the finish line at m/s. Find his acceleration.
3. Karizma completed a 10.0 km race in exactly 30 minutes. Find her average speed in km/hr.

2. Today’s Objective:
I understand the effect an object’s position has upon its energy.

4. always pulling toward the center of the Earth
Gravitational Force
always pulling toward the center of the Earth
Force: measured in Newton's

5. Newton: SI unit of force
the force that would give a mass of one kilogram an acceleration of one meter per second per second

6. Unit of force: Newton N
= 1 kg * m/s2

7. Weight: The force of gravity acting upon an object
Weight vs Mass?
Weight: The force of gravity acting upon an object

8. Weight = Fg
Fg = mg

9. An African elephant can
An African elephant can reach heights of 13 feet and possess a mass of as much as 6000 kg. Determine the weight of an African elephant in Newtons and in pounds. (Given: 1.00 N = .225 pounds)

10. Free Fall:
The downward motion of an object with only the force of gravity acting upon it

11. The maximum velocity an object will reach as it falls
Terminal Velocity
The maximum velocity an object will reach as it falls

12. FAster and faster?

13. Terminal Velocity = Constant
Air Force
Resistance = of gravity

14. Hyperlink penny falling picture to myth buster video

15. What force is acting upon a soccer ball that doesn’t run into anything but still falls to the ground?
Gravity

16. Combination of forward and vertical forces (gravity)  Curved
Projectile Motion:
Combination of forward and vertical forces (gravity)  Curved

17. Energy: the ability to perform some kind of work
Joules: SI unit of measuring energy

19. Joule: SI Unit of energy

20. 2 General
Types of Energy
Kinetic Energy: The energy of motion
Depends on
mass and speed

21. 2 General
Types of Energy
Kinetic Energy: The energy of motion
Depends on
mass and speed

22. KE KE

24. Mikayla is riding The Sooper
Coaster. Determine the kinetic
energy of a 625-kg roller coaster
car that is moving with a speed of
18.3 m/s.

25. Energy that is stored based on the position of the object
Potential Energy:
Energy that is stored based on the position of the object

27. Candis is diving from the top of a 10. 0 m high diving platform
Candis is diving from the top of a 10.0 m high diving platform. She has a mass of 50 kg. Calculate her potential energy relative to the ground.

28. Today’s Objective: I can describe motion using Newton’s Law’s of Motion.

29. Arrange 4 pennies in a row so they are touching each other.
Using your index finger, slide a 5th penny across the surface in line with the row of pennies so that it strikes a penny at one end of the row.

30. Write a description of your observations
Write a description of your observations. Describe how each penny moves as a result of the collision.
What do you think caused the pennies to move after the collision? Why didn’t they move before the collision?

31. Create a table that looks like this:
Trial
Observation
Fast
Slow
Accelerate/
Stop

32. Place the index card flat on the table.
Put a coin in the middle of the card.
As quickly as you can, remove the card by sliding it out from under the coin.
Record your
observations.

33. Repeat step one removing the card slowly.
Record your results.

34. Repeat step one again. This time slowly accelerate the card and then suddenly bring it to a stop. Record your observations.