Work And Power
Bayani Gaba-gaba
Two students carry identical boxes of books up the same staircase. One runs and arrives out of breath in 8 seconds; the other strolls up in 40. They have done exactly the same amount of work, and they are nowhere near equally powerful. That distinction is the heart of this topic.
Here you will meet the equation for work done, the two energy equations that go with it for height and for speed, the conservation rule that ties all three together, and the definition of power that separates how much energy from how quickly.
Manufura
- Know and use the relationship between work done, force and distance moved in the direction of the force: W = F x d
- Know that work done is equal to energy transferred
- Know and use the relationship between gravitational potential energy, mass, gravitational field strength and height: GPE = m x g x h
- Know and use the relationship: kinetic energy = 0.5 x mass x speed squared
- Understand how conservation of energy produces a link between gravitational potential energy, kinetic energy and work
- Describe power as the rate of transfer of energy or the rate of doing work
- Use the relationship between power, work done (energy transferred) and time taken: P = W/t
Takardar Darasi
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Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Nazarin Darasi
Barka da kammala darasi akan 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.
- Work done is calculated using: A) force x time B) force x distance moved in the direction of the force C) force / distance D) mass x speed Answer: B
- A force of 30 N moves a box 5 m in the direction of the force. The work done is: A) 6 J B) 35 J C) 150 J D) 900 J Answer: C
- If the speed of an object doubles, its kinetic energy: A) stays the same B) doubles C) is four times greater D) is halved Answer: C
- Power is defined as: A) the total energy transferred B) force x distance C) the rate of transfer of energy D) energy x time Answer: C
- A machine does 6000 J of work in 30 s. Its power is: A) 20 W B) 200 W C) 2000 W D) 180000 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 Work And Power? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
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