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March 1 & 4. Action: Earth pulls moon. - What is the reaction ? - What is stronger – action, reaction , or same? - What Law defends your answer?. Action: Earth pulls moon. What is stronger – action, reaction, or same?. Action(Earth pulls moon) Reaction (moon pulls Earth)

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Action: Earth pulls moon. - What is the reaction? - What is stronger – action, reaction, or same? - What Law defends your answer?


Action earth pulls moon what is stronger action reaction or same
Action: Earth pulls moon.What is stronger – action, reaction, or same?

  • Action(Earth pulls moon)

  • Reaction (moon pulls Earth)

  • Same!


What law defends your answer
What law defends your answer?

  • 1st Law

  • 2nd Law

  • 3rd Law


Google
Google…

  • PHET Gravity and orbits

  • Click the first link

  • Run the simulation and complete the Lab Activity Sheet.

    • This is due in 30 MINUTES for a grade – you will (10 points based on completion)

    • Then, we will have a graded, individual, 30 point POST LAB to assess this lab activity.


1 why did newton think there must be a force acting on the moon
#1 –Why did Newton think there must be a force acting on the moon?

  • It moved in a straight line, not a circle

  • It moved in a circle, not a straight line

  • I had no clue how to answer this question


#2 What did Newton conclude about the force that pulls apples to the ground and the force that holds the moon orbit?

  • They were different forces

  • They were the same force

  • I had no clue how to answer this question


3 if the moon falls why doesn t it get closer to earth
#3 If the moon falls, why doesn’t it get closer to Earth? apples to the ground and the force that holds the moon orbit?

  • It has a large tangential speed, so it falls around Earth and not into it

  • It has a small tangential speed, so it falls around Earth and not into it

  • I had no clue how to answer this question


#4 apples to the ground and the force that holds the moon orbit?

  • What is meant by tangential speed?

    • Popcorn…


#5 apples to the ground and the force that holds the moon orbit?

  • How did Newton check his hypothesis that there is an attractive force between Earth and moon?

    • Popcorn…


#6 apples to the ground and the force that holds the moon orbit?

  • What is required before a hypothesis can become a theory?

    • Popcorn…


#6 apples to the ground and the force that holds the moon orbit?

  • What is required before a hypothesis can become a theory?

    • Popcorn…


7 since there is gravity between the planets and the sun why don t the planets crash into the sun
#7 Since there is gravity between the planets and the sun, why don’t the planets crash into the sun?

  • They have small tangential speeds, so they fall around sun and not into it

  • They have large tangential speeds, so they fall around sun and not into it

  • I had no clue how to answer this question



How would these gravity forces change if the sun got more massive
How would these gravity forces change if the Sun Earth and the Sun.got more massive?

  • Increase

  • Decrease

  • Stay the same


How would these gravity forces change if the earth was much closer to the sun
How would these gravity forces change if the Earth was much closer to the Sun?

  • Increase

  • Decrease

  • Stay the same


How would these gravity forces change if the earth got much less massive
How would these gravity forces change if the Earth got much closer to the Sun?less massive?

  • Increase

  • Decrease

  • Stay the same


How would these gravity forces change if the earth and sun were moved farther apart
How would these gravity forces change if the Earth and Sun were moved farther apart?

  • Increase

  • Decrease

  • Stay the same


Choose the picture of how the earth would move if you turned off the gravity forces
Choose the picture of how the Earth would move if you “turned off” the gravity forces.


Changes to make to your post lab
Changes to make to your post lab: “turned off” the gravity forces.

  • Make sure #2 and 4 say massive

  • Change the answer choices in #11 to “enjoyable” rather than “useful”

  • When you are done… Place in in box upside down; RETURN CLICKER IN ORDER; silently BEGIN your HW


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