Energy, Work And Power
Bayani Gaba-gaba
Nothing happens without energy being shifted from one store to another. A falling diver, a glowing bulb, a sprinting athlete, a charging phone: each is energy moving from where it was kept to somewhere new. The grand rule that ties it all together is that the total never changes, only its form and location.
In this lesson you will name the energy stores, describe how energy is transferred by forces, currents, heating and waves, and use the principle of conservation of energy to read flow and Sankey diagrams. You will also calculate kinetic energy, gravitational potential energy, work and power, always showing the equation, the substitution and the answer with units.
Manufura
- [Core] State that energy may be stored as kinetic, gravitational potential, chemical, elastic (strain), nuclear, electrostatic and internal (thermal)
- [Core] Describe how energy is transferred between stores during events and processes, including examples of transfer by forces (mechanical work done), electrical currents (electrical work done), heating and by electromagnetic, sound and other waves
- [Core] Know the principle of conservation of energy and apply this principle to simple examples including the interpretation of simple flow diagrams (Sankey diagrams are not required)
- [Supplement] Recall and use the equation for kinetic energy E = 1 mv2 k 2
- [Supplement] Recall and use the equation for the change in gravitational potential energy ΔE = mgΔh p
Takardar Darasi
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Nazarin Darasi
Barka da kammala darasi akan Energy, Work And Power. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which is NOT an energy store? A. chemical B. heating C. elastic (strain) D. gravitational potential Answer: B
- A 2 kg ball moves at 10 m/s. Its kinetic energy is A. 10 J B. 20 J C. 100 J D. 200 J Answer: C
- A 5 kg mass is lifted 4 m (g = 9.8 N/kg). The gain in gravitational potential energy is A. 20 J B. 49 J C. 196 J D. 200 J Answer: C
- A force of 20 N moves a box 3 m in the direction of the force. The work done is A. 6.7 J B. 23 J C. 60 J D. 600 J Answer: C
- A motor does 800 J of work in 4 s. Its power output is A. 0.005 W B. 200 W C. 800 W D. 3200 W Answer: B
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
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Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Energy, Work And Power? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
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