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Understanding Energy: Kinetic & Potential Energy Review

Explore the concepts of kinetic and potential energy, including calculations, mass-velocity relationships, gravitational and elastic potential energy, and the law of conservation of energy. Learn about heat flow, work, power, heat transfer methods, and the Doppler Effect. Enhance your understanding of energy transformations and the interplay between different forms of energy.

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Understanding Energy: Kinetic & Potential Energy Review

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  1. Goal 3 Review

  2. Kinetic Energy • ½m(v)² • 2a. ½(5)(4)² • Mass and velocity • 3a. Increases • 3b. Increases • Potential Energy • 4a. mgh

  3. 5a. Gravitational • 5b. Elastic • 5c. Nuclear • 5d. Chemical • 5e. Electrical • 1(9.8)(2)=19.6 J • 6b. 2(9.8)(1)=19.6J • Mass and Height • 7a. Increase • 7b. Increase

  4. Mechanical Energy 20 Joules of energy at the top of the hill. How much kinetic and potential energy ¾ of the way down the hill. • Law of conservation of energy • 9a. Decreases, Increases, Stays the same • 9b. On board • 10a. Increases Temperature • 10b. Decreases • 10c. Greater • 10d. Greater • HEAT FLOWS FROM HIGH TO LOW

  5. W F D • Work • 11a. SAME • 11b. W=FxD • 11c. Joules (energy and Work) • 11d. 1470/20=73.5N • 11e. 62x9.8=607.6N 607.6x0.8=486.1 J • Power, Watts • 12a. 40x9.8x0.25=98J 98/2=49W • High , Low • Specific heat is the amount of energy it takes to change the temperature of a substance 1ºC. High SH slow to change temp. W P T

  6. Temperature Heat 15a. 3 methods of heat transfer: Radiation (waves through space No medium required; Conduction (transfer through direct contact) Convection (cycling of a fluid substance, heat rises cool falls) Conduction and convection require mediums. Radiation travels fastest through which state of matter? Conduction and Convection? Wave on board Wave on board Period Frequency measured in hertz (hz) Inverse, decreases Wavelength (λ) x frequency (f) V Λ f

  7. 21b. 280 x 1.5 = 420 21c. 5/2.5 =2 Inversely, increases Longitudinal/compressional Transverse Energy , Matter Directly Higher Faster, Slower 28 and 29 Radio, Micro, Infrared, ROY G. BIV, Ultraviolet, X-ray, Gamma Energy, Wavelength, Frequency Change in wave frequency as an object moves toward or Away from an observer =Doppler Effect Toward increase in frequency away decrease

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