Again notes are recommended Chap 9 stuff Explain the difference between linear speed and rotational speed Explain the difference between rotation and revolution And then Two ladybugs are on a turntable One is at the edge and the other is 13 of the way out from the center How much fas ID: 444552
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Slide1
Chapters 9,10,&11 review
Again, notes are recommendedSlide2
Chap 9 stuff
Explain the difference between linear speed and rotational speed.
Explain the difference between rotation and revolution.Slide3
And then…
Two ladybugs are on a turntable. One is at the edge and the other is 1/3 of the way out from the center. How much faster does one on the edge travel than the other?
Which part of the earth’s surface has the greatest rotational speed?
Which part has the greatest linear speed?Slide4
And then…
What kind of force gives rise to circular motion?
What is the difference between centripetal force and centrifugal force?Slide5
And then…
Why does the water not fall out of the bucket when Dr. Mason swings it overhead?
You are whirling a rock overhead on a string. If the string breaks, will the rock fly off in a straight line path because of centripetal force, centrifugal force or lack of force?Slide6
And then…
A bug is at the bottom of a can that is being whirled overhead. There is an action/reaction pair of forces between the bug and the can. Which of these is the centripetal force and which is the centrifugal force?Slide7
Center of gravity stuff
Define center of gravity
The complicated motion of a thrown baseball bat can be reduced to what two kinds of motion?Slide8
And then…
How do you find the
CoG
of a regularly shaped object?
How do you find the
CoG
of an irregularly shaped object?Slide9
And then…
Give examples of three objects whose centers of gravity are not where there is any material.Slide10
And then…
When will an object topple over?Slide11
And then…
Why can you not stand with your heels and back to the wall and bend over to touch your toes without falling over?Slide12
And then…
How do tails help animals keep their balance?Slide13
And then…
Why is the Seattle space needle stable?Slide14
And then…
Explain how that crazy body bending way of clearing a high jump bar is, like, better.Slide15
And then…
Why can you not
stand on your toes
when you are facing a wall?Slide16
And then…
What is suggested by a star that wobbles off center?Slide17
And then…
Why is a meter stick standing on end unstable but it’s stable when it hangs from one end?Slide18
And then…
What happens to the
CoG
of a glass of water when a ping pong ball is pushed under the surface?Slide19
Chapter 11 stuff
Define torqueSlide20
And then…
What two things can you do to increase torque?Slide21
And then…
Explain the whole see saw thing with the balanced torques and stuff.Slide22
And then…
What is
newton’s
first law?
Explain the rotational form of
newton’s
first law.Slide23
And then…
Why is it harder for a long-legged animal to move its legs fast than a short-legged animal?Slide24
And then…
Explain rotational inertiaSlide25
And then…
What two factors influence rotational inertia?Slide26
And then…
What does a gymnast do to rotate faster
when performing a flip?