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Introduction to Electric Forces in Physics: Unit Circle and Vector Components Practice

Explore electric forces through unit circle applications with vector components practice problems and solutions for better understanding. Includes angle conversions, electroscope, and pith ball concepts.

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Introduction to Electric Forces in Physics: Unit Circle and Vector Components Practice

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  1. Intro to Electric Forces Physics 12

  2. Unit Circle

  3. Using the Unit Circle with Vector Components y A Ay=Asinθ (positive) θ x Ax=Acosθ (positive) • Practice Problems • 4.5m/s, 27° • 73N, 73° • 42m, 48° • Solutions • vx=4.0m/s, vy=2.0m/s • Fx=21N, Fy=70N • dx=28m, dy=31m

  4. Using the Unit Circle with Vector Components y A Ay=Asinθ (positive) θ x Ax=Acosθ (negative) • Practice Problems • 7.3m/s, 132° • 3.8N, 114° • 18m, 164° • Solutions • vx=-4.9m/s, vy=5.4m/s • Fx=-1.5N, Fy=3.5N • dx=-17m, dy=5.0m

  5. Using the Unit Circle with Vector Components y • Practice Problems • 62m/s, 192° • 112N, 256° • 23m, 235° • Solutions • vx=-61m/s, vy=-13m/s • Fx=-27.1N, Fy=-109N • dx=-13m, dy=-19m θ Ax=Acosθ (negative) x Ay=Asinθ (negative) A

  6. Using the Unit Circle with Vector Components y • Practice Problems • 41m/s, 303° • 2.6N, 294° • 8.4m, 338° • Solutions • vx=22m/s, vy=-34m/s • Fx=1.1N, Fy=-2.4N • dx=7.8m, dy=-3.1m θ Ax=Acosθ (positive) x A Ay=Asinθ (negative)

  7. W37°S W48°N S21°W S34°E E17°S E42°N N73°E N27°W 217° 132° 249° 304° 343° 42° 17° 117° Angle Conversions

  8. Electroscope • Draw a diagram showing the forces that exist on the leaves of the electroscope when it is placed close to the Van de Graff generator

  9. Pith Ball • Draw a free body diagram of the pith ball when it is brought close to the Van de Graff generator • Do we have the skills to address this situation?

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