Nzvimbo yegiravhiti

Dzidzawo nezveCenter of Gravity Example Questions

Kunzwisisa Nzvimbo Yekukwevera Simba
Chinhu chakasimba chinoonekwa sechinoumbwa nezvidimbu zvakawanda nekuda kweizvi simba rinokwevera pasi chinoshanda pane chimwe nechimwe chezvikamu izvi. Nemamwe mashoko, chikamu chimwe nechimwe chine huremu hwacho. Pakati pechinhu chinokwevera pasi ipo pachinhu kana kuti chakakomberedza huremu hwezvikamu zvese zvechinhu chacho.

Kana chinhu chakafanana (huwandu hwezvimwe zvinhu hwakafanana kana kuti chinhu chacho chakagadzirwa nezvinhu zvakafanana) uye chimiro chechinhu chacho chakaenzana (semuenzaniso sikweya, rectangle, denderedzwa) saka pakati pesimba rechinhu chacho panoenderana nepakati pehukuru hwechinhu chiri pakati pechinhu chacho. Kune triangle, pakati pehukuru pacho pa 1/3 awa, apo h = kureba kwetriangle.

Nzvimbo yeGravity Formula
Kana chimiro chechinhu chakaenzana uye chinhu chacho chakafanana, ipapo pakati pegiravhiti panoenderana nepakati pehukuru hwechinhu chacho, apo nzvimbo yegiravhiti uye pakati pehukuru huri pakati pechinhu. Kusiyana neizvi, kana chinhu chacho chakafanana asi chisina kuenzana, nzvimbo yepakati pesimba rinokwevera pasi rechinhu inogona kuzivikanwa uchishandisa fomura inotevera:
Information :
x = pakati pechinhu chiri pa x-axis, y = pakati pechinhu chiri pa y-axis, A = nzvimbo yechinhu chacho.

Muenzaniso wezvinetso

1. Mubvunzo webvunzo yeNyika wa2011/2012 C61 Nhamba 12

Tarisa mufananidzo wendege yakafanana! Nzvimbo iri pakati pegiravhiti yechinhu ichi munzira ye y-axis kubva papoindi Q iri…

A. 1,00 cm
B. 1,75 cm
C. 2,00 cm
Kureba 3,00 cm
E. 3,25 cm

Kukurukurirana

Kamura chinhu chacho kuita zvikamu zviviri, chikamu 1 = rectangle, chikamu 2 = triangle.
A₁ = (12,5)(2) = 25
A₂ = ½ (12,5-2,5)(3) = ½ (10)(3) = (5)(3) = 15
y₁ = ½ (2) = 1
y₂ = 1/3 (3) + 2 = 1 + 2 = 3
Makorodheni epakati pegiravhiti yechinhu chiri pa y-axis:

Poindi Q = poindi nhema iri pasi pepakati pechinhu chacho.
Mhinduro chaiyo ndeiyi B.

2. Mubvunzo webvunzo yeNyika wa2011/2012 A81 Nhamba 12

Nzvimbo yepakati pegiravhiti yemufananidzo wendege sezvakaratidzwa mumufananidzo uri padivi re x-axis iri...

A. 4,5 cm
B. 4 cm
C. 3,5 cm
Kureba 3 cm
E. 2 cm

Kukurukurirana
Kamura chinhu chacho kuita zvikamu zviviri, chikamu 1 = rectangle, chikamu 2 = triangle.
A₁ = (6-0)(3-0) = (6)(3) = 18
A₂ = ½ (6-3)(6-3) = ½ (3)(3) = 4,5
y₁ = ½ (3) = 1,5
y₂ = 1/3 (6-3) + 3 = 1/3 (3) + 3 = 1 + 3 = 4
Makorodheni epakati pegiravhiti yechinhu chiri pa y-axis:

Mhinduro chaiyo ndiE.

3. Mibvunzo yebvunzo dzeNyika dza2018

Teererai zvirevo zvinotevera:

(1) Dzokorora maitiro ekusarudza mutsetse uri pakadhibhodhi kubva panzvimbo dzakasiyana dzekurembera, uye nyora nzvimbo inopindirana mitsetse miviri senzvimbo inokwevera dhibhodhi.

(2) Sunga magumo eshinda patsono woisa huremu woisa tsono mukadhibhodhi.

(3) Dhirowa mutsetse uchitevedza madotsi ari pakadhibhodhi.

(4) Maka pfungwa dziri pashinda pakadhibhodhi.

(5) turika kadhibhodhi nekubata hwaro hwetsono

Kuti uone nzvimbo iri pakati pesimba rinokwevera pasi rekadhibhodhi risina kurongeka, kutevedzana kwakarurama kwematanho ndekwekuti...

Kukurukurirana

Kurongeka kwakarurama kwematanho ndekwekuti 2, 5, 4, 3, 1.