Mehlala ea likhohlano tsa inelastic

Mehlala e 5 ea ho thulana ha inelastic

1. Kulo e boima ba digrama tse 30 e tsamayang ka lebelo la 30 m/s e otla boloko ba lepolanka bo boima ba 1 kg bo phomotseng. Fumana lebelo la boloko haeba kulo e kentswe bolokong!
Puisano
Hoa tsebahala :
Boima ba kulo (m₁) = digrama tse 30 = 0,03 kg
Boima ba boloko (m₂) = 1 kg
Lebelo la pele la kulo (v)₁) = 30 m/s
Lebelo la pele la boloko (v₂) = 0 (boloko e sa sisinyeheng)
E botsitsoe : lebelo la kulo le thibelo kamora ho thulana (v')
Jawab :
Foromo molao oa paballo ea lebelo haeba lintho tse peli li khomarelana ka mor'a ho thulana:
m₁ v₁ +m₂ v₂ = (m₁ +m₂) v'
(0,03)(30) + (1)(0) = (0,03 + 1) v'
0,9 + 0 = 1,03 v'
0,9 = 1,03 v'
v' = 0,9 / 1,03
v' = 0,87 m/s
Lebelo la kulo le boloko ka mora ho thulana ke 0,87 m/s.

2. Dintho A le B ka nngwe di na le boima ba 2 kg mme di tsamaelana ka lebelo la v._A = 6 ms^-1 le v_B = 4 ms^-1Haeba lintho ka bobeli ho thulana ha inelastic ka botlalo, joale lebelo la lintho tse peli kamora ho thulana ke ...
Puisano
Hoa tsebahala :
Boima ba ntho A (m_A) = 2 kg
Boima ba ntho B (m_B) = 2 kg
Lebelo la pele la ntho A (v)_A) = -6 m/s
Lebelo la pele la ntho B (v)_B) = 4 m/s
E botsitsoe : lebelo la lintho tse peli kamora ho thulana (v')
Jawab :
m_A v_A +m_B v_B = (m_A' + m_B) v'
(2)(-6) + (2)(4) = (2 + 2) v'
-12 + 8 = 4 v'
-4 = 4 v'
v' = -4 / 4
v' = -1 m/s
Lebelo la lintho ka bobeli ka mor'a ho thulana ke 1 m/s.

3. Lintho tse peli ka 'ngoe li na le boima ba m₁ = 3 kg le m₂ = 4 kg e tsamaya ka mahlakoreng a fapaneng ho ya ho e mong ka lebelo v₁ = 10 m/s le v₂ = 12 m/s. Lintho tse peli lia thulana 'me ka mor'a ho thulana lia khomarelana. Lebelo la lintho tse peli ka mor'a ho thulana ke…
Puisano
Hoa tsebahala :
Boima ba ntho 1 (m₁) = 3 kg
Boima ba ntho 2 (m₂) = 4 kg
Lebelo la ntho ea 1 (v)₁) = -10 m/s
Lebelo la ntho ea 2 (v)₂) = 12 m/s
E botsitsoe : lebelo lintho ka bobeli ka mor'a ho thulana (v')
Jawab :
m₁ v₁ +m₂ v₂ = (m₁' + m₂) v'
(3)(-10) + (4)(12) = (3 + 4) v'
-30 + 48 = 7 v'
18 = 7 v'
v' = 18 / 7
v' = 2,6 m/s
Lebelo la lintho ka bobeli ka mor'a ho thulana ke 2,6 m/s.

4. Sedan e neng e emisitsoe e ile ea thuloa ke bese e neng e tsamaea ka lebelo la 36 km/hora. Kamora ho thulana, sedan le bese li ile tsa thulana. Haeba boima ba bese e le 2000 kg 'me boima ba sedan e le 1000 kg, lebelo la likoloi tse peli ke lefe kamora ho thulana?

A. 3,45 m/s

B. 4,67 m/s

C. 5,45 m/s

D. 6,67 m/s

E. 7,67 m/s

Puisano:

Hoa tsebahala hore :

v bese = 36 km/h = 36000 m/3600 s = 10 m/s

bese ea m = 2000 kg

v sedan = 0

sedan ea m = 1000 kg

E botsitsoe :

Lebelo la sedan le bese kamora ho thulana (v')?

Karabo :

m₁ v₁ +m₂ v₂ = (m₁ +m₂) v'

(2000)(10) + (1000)(0) = (2000 + 1000) v'

20.000 = 3000 v'

v' = 20.000 / 3000 = 6,67 m/s

Karabo e nepahetseng ke D.

5. Kulo ea ligrama tse 20 e tsamaeang ka lebelo la 100 m/s e otla boloko ba patsi bo sa sisinyeheng 'me e lula ho eona. Haeba boima ba boloko ba patsi e le ligrama tse 500, lebelo la boloko ba patsi le kulo ke lefe hang ka mor'a hore e thulane?

A. 1,50 m/s

B. 2,55 m/s

C. 3,85 m/s

D. 4,75 m/s

E. 5,65 m/s

Puisano:

Hoa tsebahala hore :

kulo e kholo = digrama tse 20 = 0,02 kg

v kulo = 100 m/s

boloko ba m = digrama tse 500 = 0,5 kg

boloko ba v = 0

E botsitsoe :

Lebelo la kulo le thibelo hang ka mora ho thulana (v')?

Karabo :

m₁ v₁ +m₂ v₂ = (m₁ +m₂) v'

(0,02)(100) + (0,5)(0) = (0,02 + 0,5) v'

2 + 0 = 0,52 v'

2 = 0,52 v'

v' = 2 / 0,52 = 3,85 m/s

Karabo e nepahetseng ke C.