Physics: Forces And Motion: Units
Gbogbo ọrọ náà
Before you can describe how fast something moves or how hard it pushes, you need a shared language of measurement. Physics uses the SI system - a set of standard units that scientists around the world agree on.
In this lesson you will learn the key units used in forces and motion, how to convert between common units, and why using the correct unit matters in calculations and exams.
Ebumnobi
- Use the following units: kilogram (kg), metre (m), metre/second (m/s), metre/second2 (m/s2), newton (N), second (s) and newton/kilogram (N/kg)
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Ekele diri gi maka imecha ihe karịrị na Physics: Forces And Motion: 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.
- The SI unit of force is the: A) Joule B) Watt C) Newton D) Pascal Answer: C
- Speed is measured in: A) m B) m/s C) m/s squared D) kg Answer: B
- To convert km/h to m/s, you: A) Multiply by 3.6 B) Divide by 3.6 C) Multiply by 1000 D) Divide by 60 Answer: B
- The SI unit for pressure is the: A) Newton B) Joule C) Pascal D) Watt Answer: C
- 1 kg is equal to: A) 10 g B) 100 g C) 1000 g D) 10000 g Answer: C
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The Language of Physics: Physical Quantities and Units
Associate physical quantities with their International System of Units (SI)and perform conversions among SI units using scientific notation
"Physics: The Language of Physics: Physical Quantities and Units" 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/1-3-the-language-of-physics-physical-quantities-and-units. Access for free at https://openstax.org/books/physics/pages/1-introduction
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