666662 1 - University of Wisconsin–Plattevillepeople.uwplatt.edu/~vonmaluskid/D/day26.pdfRolling...

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Transcript of 666662 1 - University of Wisconsin–Plattevillepeople.uwplatt.edu/~vonmaluskid/D/day26.pdfRolling...

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Common Moments of Inertia ∑=i

iirmI 2

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Static Equilibrium

If the net torque is 0, no rotation will occur.

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Example

A 40kg 5m long beam is supported (not attached) to the two posts in the figure. A 20kg boy starts walking along the beam. How close can he get to the right end of the beam without it falling over?

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Rank these 4 from easiest to hardest to hold without the meter stick rotating.

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Rolling Motion

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Rolling without slipping

When the wheel makes one full rotation it travels a distance equal to the circumference:

Where T is the time for one revolution.

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Note: The bottom of the wheel is instantaneously at rest. The top of the wheel is moving with twice the translational velocity.

The point of contact is the pivot point but the wheel rotates about the center.

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Demo: Tricycle

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Energy in rolling

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Example

Different shapes start at the top of a ramp and are released with zero initial velocity. Which reaches the bottom first if they have the same mass?

Demo: Do it


people.uwplatt.edupeople.uwplatt.edu/~vonmaluskid/hw/sup/ch8.pdfthen pushes the puck across frictionless ice in the positive x- direction with a speed of 2.0 m/s. The rocket fires

people.uwplatt.edupeople.uwplatt.edu/~vonmaluskid/hw/sup/ch8.pdfthen pushes the puck across frictionless ice in the positive x- direction with a speed of 2.0 m/s. The rocket fires

Day26 1 thessalonians517

Day26 1 thessalonians517

people.uwplatt.edupeople.uwplatt.edu/~vonmaluskid/hw/sup/ch6.pdf · CHAPTER 6 Dynamics I: Motion Alono a Line For homework assigned on MasteringPhysics, go to

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Dr Eng. Jan Paj…k Web pages of Jan Paj…k day26

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Chem 241people.chem.umass.edu/cjoseph/chem241/lecture31.pdf · Boric acid is a mild antiseptic • 4. Essential nutrient in plants-666662 ... 11 Compounds of Boron • 1. Hydrides.

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people.uwplatt.edupeople.uwplatt.edu/~vonmaluskid/hw/sup/ch4.pdfsteadily rotatino wheel. a. Rank in order, ... A projectile is launched over horizontal ground at an angle ... For the

people.uwplatt.edupeople.uwplatt.edu/~vonmaluskid/hw/sup/ch4.pdfsteadily rotatino wheel. a. Rank in order, ... A projectile is launched over horizontal ground at an angle ... For the

Start Ch 20 - University of Wisconsin–Plattevillepeople.uwplatt.edu/~vonmaluskid/E/day31.pdf · ... Self propagating waves of ... A wave travels along a string in a horizontal direction

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Chem 241people.chem.umass.edu/cjoseph/chem241/lecture27.pdf · Chem 241 Lecture 27-666662 ... 2 Fuel Cells Reactions Types of Compounds Recap-666662 ... 3 Metallic Hydrides Metallic

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people.uwplatt.edupeople.uwplatt.edu/~vonmaluskid/spring/hw/sup/ch8.pdfIl A roller coaster car crosses the top of a circular loop-the-loop at twice the critical speed. What is the

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Math 2311 Review for Test 3 - UHbekki/2311/notes/day26.pdf · who complete their course will improve their SAT Math score by ... After 500 540 512 530 533 603 ... c. Explain why the

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Start Ch - University of Wisconsin-Plattevillepeople.uwplatt.edu/~vonmaluskid/spring/A/blank/ch9.pdf · Impulsive Force An impulsive force is a large force exerted during a small

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Chem 241people.chem.umass.edu/cjoseph/chem241/lecture28.pdf · radiation of the caesium 133 atom.-666662 ... 11 Halides • MX. Have NaCl structure, except CsCl, CsBr, and CsI (CsCl

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Day26 "The Return" [The Book]

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