Physics: Energy Resources And Energy Transfers: Units
Akopọ
Energy is the currency of physics, and like any currency it needs a unit before the numbers mean anything. The energy section leans on eight of them, and they are not eight unrelated facts: each one is built from the others in a way that you can reconstruct rather than memorise.
This lesson sets out the kilogram, joule, metre, metre per second, metre per second squared, newton, second and watt. You will see how the joule grows out of the newton, how the watt grows out of the joule, and how tracking units through a calculation catches a wrong answer before the examiner does.
Awọn Afojusun
- 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)
Àwòrán ọpọlọ
A ti ṣe àwòrán kókó yìí kí o lè rí bí àwọn èrò ṣe so pọ̀.
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Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Physics: Energy Resources And Energy Transfers: Units. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- The SI unit of energy is the: A) newton B) watt C) joule D) kilogram Answer: C
- One watt is equal to: A) 1 joule B) 1 joule per second C) 1 newton metre D) 1 newton per second Answer: B
- Which of these has no unit? A) Power B) Work done C) Efficiency D) Weight Answer: C
- A force of 20 N moves an object 4 m in the direction of the force. The work done is: A) 5 J B) 16 J C) 24 J D) 80 J Answer: D
- 3.0 kW expressed in watts is: A) 3 W B) 30 W C) 300 W D) 3000 W Answer: D
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
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
Àwọn àjọ mìíràn ló tẹ̀ wọ́n jáde lábẹ́ ìwé àṣẹ ṣíṣí, a sì dá wọn lọ́lá bí wọ́n ṣe béèrè. Àwọn ìjápọ̀ ń ṣí ojú òpó wọn.
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