Physical Quantities And Measurement Techniques
Gbogbo ọrọ náà
Every number in physics is only as good as the measurement behind it. Before you can talk about speed, force or energy, you have to be able to measure length, volume and time reliably, and know whether a quantity carries a direction or not. This is the toolkit the whole subject is built on.
In this lesson you will choose the right instrument for a length, a volume and a time interval, use a clever multiple-measurement trick to pin down a tiny distance or a short time accurately, and sort quantities into scalars and vectors. You will also learn to combine two vectors at right angles, a skill examiners test again and again.
Ebumnobi
- Describe the use of rulers and measuring cylinders to find a length or a volume
- Describe how to measure a variety of time intervals using clocks and digital timers
- Determine an average value for a small distance and for a short interval of time by measuring multiples (including the period of oscillation of a pendulum)
- [Supplement] Understand that a scalar quantity has magnitude (size) only and that a vector quantity has magnitude and direction
- [Supplement] Know that the following quantities are scalars: distance, speed, time, mass, energy and temperature
- [Supplement] Know that the following quantities are vectors: force, weight, velocity, acceleration, momentum, electric field strength and gravitational field strength
- [Supplement] Determine, by calculation or graphically, the resultant of two vectors at right angles, limited to forces or velocities only
Nkuzi Olu
Gee ntị na nkuzi a na ngwa
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Kaadị ncheta
Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.
Mee omume kaadị ndị a na ngwa
Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Physical Quantities And Measurement Techniques. 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.
- Which instrument is most suitable for measuring the volume of a liquid? A. metre rule B. measuring cylinder C. stopwatch D. balance Answer: B
- A student times 20 swings of a pendulum as 24.0 s. The period is: A. 24.0 s B. 4.8 s C. 1.2 s D. 0.83 s Answer: C
- Which of these is a vector quantity? A. mass B. temperature C. velocity D. energy Answer: C
- Forces of 6 N and 8 N act at right angles on a point. The resultant is: A. 2 N B. 10 N C. 14 N D. 48 N Answer: B
- Timing many swings instead of one mainly improves the measurement by: A. increasing the period B. removing parallax C. sharing the reaction-time error over many swings D. changing the pendulum length Answer: C
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Mụtakwuo ihe site na isi mmalite mepere emepe
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Akụkụ akwụkwọ
Vectors, Scalars, and Coordinate Systems
What is the difference between distance and displacement? Whereas displacement is defined by both direction and magnitude, distance is defined only by magnitude. Displacement is an example of a vector quantity. Distance is an example of a scalar quantity. A vector is any quantity with both magnitude
"College Physics: Vectors, Scalars, and Coordinate Systems" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/college-physics/pages/2-2-vectors-scalars-and-coordinate-systems. Access for free at https://openstax.org/books/college-physics/pages/1-introduction
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Akụkụ akwụkwọ
Vector Addition and Subtraction: Graphical Methods
A vector is a quantity that has magnitude and direction. Displacement, velocity, acceleration, and force, for example, are all vectors. In one-dimensional, or straight-line, motion, the direction of a vector can be given simply by a plus or minus sign. In two dimensions (2-d), however, we specify th
"College Physics: Vector Addition and Subtraction: Graphical Methods" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/college-physics/pages/3-2-vector-addition-and-subtraction-graphical-methods. Access for free at https://openstax.org/books/college-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.
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Physical Quantities And Measurement Techniques? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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