April 9 th , 2014

1 / 16

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.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

PowerPoint Slideshow about ' April 9 th , 2014' - syshe

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
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.
April 10, 2014

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
• 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
• 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

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

http://www.pbslearningmedia.org/resource/phy03.sci.phys.mfw.roller/centripetal-force-roller-coaster-loops/http://www.pbslearningmedia.org/resource/phy03.sci.phys.mfw.roller/centripetal-force-roller-coaster-loops/

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
• 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)