Lipotso tse 7 Khoebo
1. Sheba setšoantšo se latelang!
Palo ea mosebetsi o entsoeng holim'a boloko ke ...
A. 3 Joule
B. 8 Joule
C. 16 Joule
D. 48 Joule
Puisano
Hoa tsebahala hore:
Matla (F) = 12 Newton
Ho falla (ma) = limithara tse 4
E botsitsoe: Boiteko (W)
Karabo:
Setšoantšong se ka holimo, ho falla ha ntho ho lebile lehlakoreng le le leng le matla. Foromo ea mosebetsi bakeng sa nyeoe ena ke:
W = F s = (12 Newton)(limithara tse 4) = 48 Limithara tsa Newton = 48 Joule
Karabo e nepahetseng ke D.
2. Sekotwana sa lepolanka se sutumelletsoa ka matla a 200 N e le hore se tsamaye sebaka sa 2 m, mosebetsi o etswang ke sekotwana sa lepolanka ke...
A. 20 J
B. 100 J
C. 200 J
D. 400 J
Puisano
Hoa tsebahala hore:
Matla (F) = 200 Newton
Ho falla (ma) = limithara tse 2
E botsitsoe: Boiteko (W)
Karabo:
Khoebo:
W = F s
W = (200 Newton)(limithara tse 2)
W = 400 Newton metres
W = 400 Joule
Karabo e nepahetseng ke D.
3. Sheba setšoantšo!
Mokhanni oa sedan o batla ho paka koloi ea hae hantle 0,5 m ka pel'a teraka eo qalong e neng e le 10 m ho tloha sedan. Sedan e tla hloka boiteko bo bokae?
A. 525 J
B. 500 J
C. 495 J
D. 475 J
Puisano
Hoa tsebahala hore:
Ho falla (ma) = limithara tse 10 - limithara tse 0,5 = limithara tse 9,5
Matla (F) = 50 Newton
E botsitsoe: Boiteko (W)
Karabo:
Foromo ea khoebo:
W = F s
W = (50 Newton)(limithara tse 9,5)
W = 475 Newton metres
W = 475 Joule
Karabo e nepahetseng ke D.
4. Sheba setšoantšo!
Boiteko bo entsoeng ke Andi le Toni ba ho tsamaisa koloi ka limithara tse 4 haeba matla a bana ba babeli e le 50 N le 70 N ka ho latellana ke...
A. 80 joule
B. 200 joule
C. 280 joule
D. 480 joule
Puisano
Hoa tsebahala hore:
Ho falla (ma) = limithara tse 4
Matla a sephetho (F) = 50 Newtons + 70 Newtons = 120 Newtons
E botsitsoe: Boiteko (W)
Karabo:
Khoebo:
W = F s = (120 Newton)(limithara tse 4) = 480 Limithara tsa Newton = 480 Joule
Karabo e nepahetseng ke D.
5. Mokhanni o hula koloi e emeng jwalo ka ha ho bontshitswe setshwantshong, e le hore koloi e tsamaye sebaka sa 1.000 cm. Mosebetsi o entswe ke…..
A. 250 Joule
B. 1.000 Joule
C. 2.500 Joule
D. 250.000 Joule
Puisano
Hoa tsebahala hore:
Bolela diyuniti tsohle Tsamaisong ya Matjhaba
Matla (F) = 250 Newton
Sebaka (ma) sa ho falla = 1000 cm = 1000/100 metres = 10 metres
Potso: Bongata ba boiteko (W)
Karabo:
Foromo ea khoebo:
W = F s = (250 Newton)(limithara tse 10) = 2500 Limithara tsa Newton = 2500 Joule
Karabo e nepahetseng ke C.
6. Sheba setshwantsho se latelang sa motsamao wa dintho!
Haeba mosebetsi o etsoang ke matla ana nthong e le 375 Joules, ntho eo e ka sutha sebaka...
A. Limithara tse 7,5
B. Limithara tse 15
C. Limithara tse 22,5
D. Limithara tse 25
Puisano
Hoa tsebahala hore:
Mosebetsi (W) = 375 Joule
Matla a sephetho ( ΣF) = 40 N + 10 N – 25 N = 25 Newtons (ka ho le letona)
E botsitsoe: Ho falla (ba)
Karabo:
Foromo ea khoebo:
W = F s
Ho falla:
s = W / F = 375 Joule / 25 Newtons
s = limithara tse 15
Karabo e nepahetseng ke B.
7. Mesebetsi ea bana ba bang ba ka tlase e sa kenyelletseng ho etsa khoebo ke...
A. ho sutumelletsa kariki ya bolo ya nama dimithara tse 10
B. ho sututsa koloi e emeng ho fihlela e tsamaya
C. ho sututsa lebota le tiileng ho fihlela o fufuleloa
D. Ho palama baesekele ho tloha hae ho ea sekolong
Puisano
Foromo ea khoebo:
W = ΣF s
Tlhahisoleseding: W = boiteko kapa mosebetsi, F = matla, s = ho falla
Ho latela foromo e ka holimo, ho na le mosebetsi haeba ho na le matla 'me ho na le ho falla (ho na le motsamao).
Karabo e nepahetseng ke C.
Mohloli oa lipotso:
Lipotso tsa Tlhahlobo ea Naha ea Saense ea Sekolo se Phahameng sa Bana ba Banyenyane/Sekolo se Phahameng sa Boislamo
