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April 9 th , 2014 - PowerPoint PPT Presentation

April 9 th , 2014. Homework : Read pgs. 64-67: Define Centripetal force, answer section assessment questions (pg. 67) 2 a, 2 b.- on pg. 18 in your notebook.

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April 9th, 2014

• Homework:Read pgs. 64-67: Define Centripetal force, answer section assessment questions (pg. 67) 2 a, 2 b.- on pg. 18 in your notebook.

• Do Now: Write down homework, Open your note to pg. 18: Make a list of all the forces you think act on a rollercoaster and its riders.

Homework: Read 64-67 if you did not last night

Do Now:

Update T.O.C:

• pg. 17: Roller Coaster forces Video- glue/ tape in sheet

• Pg. 18: Circular Motion and Satellites

• Pg. 19 : Circular motion and Satellites activity

• Leave notebooks open to page 17-

• Open textbooks to page 64.

Define Centripetal Force roller coaster?

• Centripetal Force: Any force that causes an object to move in a circular path

• Centripetal – means “center- seeking”

• Keeps you in your seat when you are moving through a roller coaster loop– pulling you towards the center

Let it Roll- Circular Motion Activity roller coaster?-pg. 19 in your notebook

• Predict: Draw a picture of the, “Pac-man” plate and draw an arrow in the direction you predict the ball will go. Then write one-two sentences describing your prediction.

• Activity Instructions- With you partner

• Using the ping pong ball- roll the ball once around the inner rim of the paper plate.

• Record the direction the ball rolls once it reaches the cut out portion of the plate.- Draw the plate again with an arrow showing the direction t traveled in.

• Write the reason why you think the objected traveled in the direction it did

April 11, 2014 roller coaster?

Homework:Enjoy your Spring Break! Nothing is assigned! If you are not going away, if you want, Look for a Science News article- What is happening today in science.. Any new break through in Science /Technology??

Do Now:

- Open Notebook to pg. 18- if you didn’t show me the homework yesterday, Please do so Now

-Open textbook to pg. 65

Let it Roll Activity -Results roller coaster?

• What Direction did the ball travel?

• What is the reason why you think the object traveled in the direction it did?

What is a satellite? (Quest. 2A)

• An object that orbits other object in space.

• Artificial satellites- man –made (communications, military, weather etc…)

• For a satellite, centripetal force is the gravitational force that pulls the satellite toward the center of the Earth.

Turn to pg. 66-67- Look at Figure 20 satellite?

• Why does that horizontally moving projectile eventually fall to the ground?

• Because of gravity pulls it downward

What causes satellites to stay in orbit rather than falling toward the Earth?

• Inertia and the force of gravity. It has enough space and speed to follow earths circular orbit.

• Gravity causes the satellites to continuously fall toward the earth. (pulling it downward, like the ball) Since the Earths surface is curved, satellites can travel around the Earth continuously

• Move in a continuous circle means it is accelerating and is moving at a fast enough velocity to follow a circular orbit. At least 7,900 m/s

Write a one sentence summary that describes how satellites stay in orbit and why your pressed in your seat, during a ride through a roller coaster loop. (Use Centripetal Force in your summary)