Tšebeliso ea paballo ea matla a mechini bakeng sa motsamao holim'a libaka tse kobehileng - mathata le litharollo

1. Sekotwana sa 1-kg se thella fatshe hodima bokahodimo bo boreledi bo kobehileng. Fumana matla a kinetic le lebelo la sekotwana sebakeng se tlase ka ho fetisisa. Ho potlaka ka lebaka la matla a khoheli ke 10 m/s ².

Tse tsejoang:

Boima (m) = 1 kg

Phetoho ea bophahamo (h) = 5 m

Ho potlaka ka lebaka la matla a khoheli (g) = 10 m/s ²

Ho batloa: Matla a kinetic (KE) le lebelo la block.

Tharollo:

(a) Matla a kinetic

Matla a pele a mechini = matla a khoheli a ka bang teng

ME _o = PE = mgh = (1)(10)(5) = 50 Joule

Matla a ho qetela a mechini = matla a kinetic

ME _t = KE = ½ mv _t ²

Molao-motheo oa paballo ea matla a mechini o bolela hore matla a pele a mechini = matla a ho qetela a mechini:

ME _o = ME _t

PE = KE

50 = KE

Matla a Kinetic (KE) = 50 Joules.

(b) Lebelo la Block

Molao-motheo oa paballo ea matla a mechini:

Matla a pele a mechini (ME _o ) = matla a ho qetela a mechini (ME _t )

Matla a khoheli a ka bang teng (PE) = matla a kinetic (KE)

50 = ½ mv ²

2(50) / m = v ²

100 / 1 = v ²

100 = v ²

v = √100

v = 10 m/s

[irp]

2. Ntho e boima ba 2-kg e thella fatshe ntle le kgohlano. Matla a kinetic le lebelo la ntho eo ke eng ho dimithara tse 2 ka hodima lefatshe. Ho potlaka ka lebaka la matla a khoheli ke 10 m/s ²

Tse tsejoang:

Boima (m) = 2 kg

Phetoho ea bophahamo (h) = 10 – 2 = 8 m

Ho potlaka ka lebaka la matla a khoheli (g) = 10 m/s ²

Ho batlwa : matla a kinetic (KE) le lebelo (v) ho limithara tse 2 ka holim'a lefatše.

Tharollo:

(a) Matla a kinetic a limithara tse 2 ka holim'a lefatše

Matla a pele a mechini = matla a khoheli a ka bang teng

ME _o = PE = mgh = (2)(10)(8) = 160 Joule

Matla a ho qetela a mechini = matla a kinetic

ME _t = KE = ½ mv _t ²

Molao-motheo oa paballo ea matla a mechini o bolela hore matla a pele a mechini = matla a ho qetela a mechini:

ME _o = ME _t

PE = KE

160 = KE

Matla a kinetic (KE) a limithara tse 2 ka holim'a lefatše ke 160 Joules.

(b) Lebelo la ntho sebakeng se tlase ka ho fetisisa

Molao-motheo oa paballo ea matla a mechini:

Matla a pele a mechini (ME _o ) = matla a ho qetela a mechini (EM _t )

Matla a khoheli a ka bang teng (PE) = matla a kinetic (KE)

160 = ½ mv ²

160 = ½ (2) v ²

160 = v ²

v = √160 = √(16)(10) = 4√10 m/s

[ID ea sephutheloana sa wpdm='1167′]

1. Mosebetsi o etsoang ka mathata a matla le litharollo
2. Mathata le litharollo tsa matla a kinetic a mosebetsi
3. Mathata le litharollo tsa motheo oa matla a sebetsang le a mechini
4. Mathata a matla a khoheli le litharollo
5. Matla a ka bang teng a mathata le litharollo tsa selemo se tenyetsehang
6. Mathata a motlakase le litharollo
7. Tšebeliso ea paballo ea matla a mechini bakeng sa motsamao oa ho oa ka bolokolohi
8. Tšebeliso ea paballo ea matla a mechini bakeng sa motsamao oa holimo le tlase motsamaong oa ho oa ka bolokolohi
9. Tšebeliso ea paballo ea matla a mechini bakeng sa motsamao holim'a bokaholimo bo kobehileng
10. Tšebeliso ea paballo ea matla a mechini bakeng sa motsamao sefofaneng se sekametseng
11. Tšebeliso ea paballo ea matla a mechini bakeng sa motsamao oa liqhomane