fisiks

Li-vector tsa yuniti - mathata le litharollo

1. Ntho e tsamaya ka lebelo la v = (2i − 1.5j) m/s. Ho falla ha ntho ke eng kamora metsotsoana e 4?

Tse tsejoang:

Karolo e rapameng ea lebelo (v _x ) = 2 m/s

Karolo e otlolohileng ea lebelo (v _y ) = 1.5 m/s

Nako ea ho arohana (t) = metsotsoana e 4

Ho Batloa: Ho falla

Bala haholoanyane

Ho falla ha li-vector - mathata le litharollo

1. Motho o tsamaea ho tloha ntlheng ea A ho ea ntlheng ea B, limithara tse 600 ka leboea; ebe o ea ntlheng ea C, limithara tse 400 ka bophirima; ebe o ea ntlheng ea D, limithara tse 200 ka boroa; ebe o qetella ntlheng ea E, limithara tse 700 ka bochabela. Boholo ba ho falla ke bofe?

Tharollo:

Tse tsejoang:

AF = AB – BF = AB – CD = 600 – 200 = 400 m

EF = DE – DF = DE – BC = 700 – 400 = 300 m

Bala haholoanyane

Ho eketsa li-vector ho sebelisa likarolo - mathata le litharollo

1. Li-vector tse tharo joalo ka ha ho bontšitsoe setšoantšong se ka tlase.

V₁ = 30

V ₂ = 30

V ₃ = 40

Li-vector tse hlahang ke life?

Tse tsejoang:

V ₁ = 30, sekhutlo pakeng tsa V ₁ le x axis = 30 ^o

Bala haholoanyane

Litšoantšo tsa motsamao o otlolohileng - mathata le litharollo

1. Sebaka sa kerafo (se otlolohileng) khahlanong le nako (se otlolohileng) joalo ka ha ho bontšitsoe setšoantšong se ka tlase. Ntho e phomotseng e bontšitsoe ka nomoro…

Tharollo:

Nomoro ea 3, e bontšitsoeng ka mola o otlolohileng.

Bala haholoanyane

Lebelo le tloaelehileng - mathata le litharollo

1. Motho e mong o potoloha khutlonnetsepa e bolelele ba limithara tse 400 le bophara ba limithara tse 100, makhetlo a 12 ka hora e le 'ngoe. Lebelo le tloaelehileng le lebelo le tloaelehileng ke lefe?

Tse tsejoang:

Bolelele ba khutlonnetsepa = limithara tse 400

Bophara ba khutlonnetsepa = limithara tse 100

Selikalikoe sa khutlonnetsepa = (2 x 400 metres) + (2 x 100 metres) = 800 metres + 200 metres = 1000 metres

Sebaka = 12 x 1000 metres = 12,000 metres = 12 km

Bala haholoanyane

Molao-motheo oa batho ba batšo - mathata le litharollo

1. Metsi a digrama tse 200 ho 30°C a kopantswe le metsi a digrama tse 100 ho 90°C. Mocheso o ikgethang wa metsi = 1 cal.gram ⁻¹ °C ⁻¹ . Fumana mocheso wa ho qetela wa motswako!

Tse tsejoang:

Boima ba metsi 2 (m ₁ ) = 200 dikgerama

Mocheso oa metsi 1 (T ₁ ) = 30 ^o C

Boima ba metsi 2 (m2 ₎ = 100 dikgerama

Bala haholoanyane

10 Dynamics Ntho e hokahaneng ka thapo hodima pulley Mochini wa Atwood – Mathata le Ditharollo

1. Sekotwana sa A se nang le boima ba 5 kg, se behilweng hodima sefofane se bataletseng se bataletseng. Sekotwana sa B se nang le boima ba 3 kg se leketlileng pheletsong e 'ngoe ea thapo e hokahantsoeng le sekotwana sa A hodima pulley. Ho potlaka ka lebaka la matla a khoheli ke 10 m/s ^{2 .} Ho potlaka ha dikotwana ka bobedi ke eng ?

Tse tsejoang:

Boima ba boloko A (m_A) = 5 kg

Boima ba boloko B (m _B ) = 3 kg

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

Bala haholoanyane

Motsamao o chitja - mathata le litharollo

1. Ntho e boima ba 10 kg e tsamaya ka sedikadikwe ka lebelo le sa fetoheng la 4 m/s. Haeba radius ya sedikadikwe e le 0.5 metres, jwale:

1) Maqhubu a di-circle ke 4/π Hz

2) Ho potlaka ha centripetal ke 32 ms ^-2

3) Matla a bohareng ke 320 N

4) Nako ke 4π s.

Ke lipolelo life tsa 'nete?

Bala haholoanyane

Motsamao oa ho oa o lokolohileng - mathata le litharollo

1. Lejoe le oa ka bolokolohi ho tloha bophahamong ba limithara tse 45. Haeba lebelo le bakoang ke matla a khoheli e le 10 ms ^-2 , lebelo la lejoe ha le otla fatše ke lefe?

Tse tsejoang:

Bophahamo (h) = limithara tse 45

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

Ho batloa: Lebelo la ho qetela la lejoe ha le otla fatše (v _t )

Bala haholoanyane