Energy Resources And Energy Transfers: Units
Gbogbo ọrọ náà
Energy appears in almost every branch of physics, and its unit - the joule - is one of the most frequently used in any exam paper. But energy calculations also pull in mass, speed, height, force, time, and power, each with its own unit. Keeping track of all eight is the price of getting the numbers right.
This reference lists the units the Edexcel specification requires for the Energy resources and energy transfers section: kilogram, joule, metre, metre per second, metre per second squared, newton, second, and watt. You will see where each unit enters the energy equations and practise quick conversions.
Ebumnobi
- Use the following units: kilogram (kg), joule (J), metre (m), metre/second (m/s), metre/second2 (m/s2), newton (N), second (s) and watt (W)
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Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Energy Resources And Energy Transfers: Units. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- What is the SI unit of energy? A) W B) N C) J D) kg Answer: C
- Power is measured in: A) joules B) watts C) newtons D) metres per second Answer: B
- Which set of units is needed to calculate gravitational potential energy using GPE = mgh? A) kg, m/s, m B) kg, m/s2, m C) N, m, s D) J, W, s Answer: B
- One joule is equivalent to: A) 1 kg m/s B) 1 N m C) 1 W m D) 1 kg m/s2 Answer: B
- A machine does 6000 J of work in 2 minutes. Its power is: A) 3000 W B) 50 W C) 12000 W D) 100 W Answer: B
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Akwụkwọ A Na-atụ Aro
Mụtakwuo ihe site na isi mmalite mepere emepe
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Akụkụ akwụkwọ
Work, Power, and the Work–Energy Theorem
Describe and apply the work–energy theorem
"Physics: Work, Power, and the Work–Energy Theorem" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/9-1-work-power-and-the-work-energy-theorem. Access for free at https://openstax.org/books/physics/pages/1-introduction
Ndị otu ndị ọzọ bipụtara ha n'okpuru ikike mepere emepe, anyị na-ekele ha dị ka ha si chọọ. Njikọ na-emepe saịtị ha.
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