Mienzaniso yemibvunzo yebasa refizikisi uye kinetic energy

Mienzaniso mishanu yemibvunzo yebasa refizikisi uye kinetic energy

1. Mota ine huremu hwe5000 kg inotanga yakamira, yozofamba nekumhanya kwe20 m/s. Sarudza basa rose rakaitwa pamota...
Kukurukurirana
Zvinozivikanwa :
Huremu (m) = 5000 kg
Kumhanya kwekutanga (v)_o) = 0 m/s (pakutanga mota inenge yakamira)
Kumhanya kwekupedzisira (v)_t) = 20 m/s
Akabvunzwa : Kuedza kwakazara
Jawab :
Dzidziso yesimba rekushanda-kinetic inotaura kuti basa rose rakaenzana nekuchinja kwesimba rekinetic. Pamasvomhu:
Kushanda nesimba kwakazara:
W_chizere = ½ m (v)_t² - v_o²)
W_chizere = ½ (5000)(20² - 0²)
W_chizere = (2500)(400 – 0)
W_chizere = (2500)(400)
W_chizere = 1000.000
Basa rose i1000.000 Joules.

2. Chinhu chine huremu hwe10 kg chinotanga kufamba nekumhanya kwe5 m/s. Nguva pfupi inotevera chinhu chacho chinofamba nekumhanya kwe10 m/s. Sarudza basa rose rakaitwa pachinhu chacho.
Kukurukurirana
Zvinozivikanwa :
Huremu hwechinhu (m) = 10 kg
Kumhanya kwekutanga (v)_o) = 5 m/s
Kumhanya kwekupedzisira (v)_t) = 10 m/s
Akabvunzwa : kushanda nesimba kwakazara
Jawab :
Kushanda nesimba kwakazara:
Basa rose i375 Joules.

3. Mota ine huremu hwe2000 kg iri kufamba nekumhanya kwakatwasuka kwe10 m/s. Kamwe kamwe, mutyairi anoderedza kumhanya kwemota kusvika pa5 m/s. Basa rinoitwa nemutyairi pamota iri...
Kukurukurirana
Zvinozivikanwa :
Huremu hwemota (m) = 2000 kg
Kumhanya kwekutanga (v)_o) = 10 m/s
Kumhanya kwekupedzisira (v)_t) = 5 m/s
Akabvunzwa : kushanda nesimba kwakazara
Jawab :
Kushanda nesimba kwakazara:
Basa rose i75.000 Joules.
Chiratidzo chekuramba chinoreva kuti simba rinobuda pamotokari riri munzira yakasiyana nekufamba kwemotokari. Kushanda zvisina kunaka kunorevawo kuti simba rekufamba kwemotokari rinoderera.

4. Mota ine huremu hwetani imwe chete inotanga yakamira. Nguva pfupi yadarika, inofamba nekumhanya kwe10 m/s. Huwandu hwebasa rinoitwa neinjini yemota...
A. 1.000 Joule
B. 10.500 Joule
C. 15.000 Joule
D. 25.000 Joule
E. 50.000 Joules
Kukurukurirana:
Zvinozivikanwa :
m = tani imwe = 1000 kg, v_o = 0 m/s, v_t = 10 m/s
Akabvunzwa :
Kuedza (W)?
Jawab :
Basa = shanduko musimba rekinetic

Shanduko musimba rekinetic :
= ½ m(v)_t² - v_o²) = ½ (1000)(100 – 0) = ½ (1000)(100) = 50.000 kg m²/s² = 50.000 Joule
Saka W = 50.000 Joules
Mhinduro chaiyo ndiE.

5. Tafura ine huremu hwe10 kg inotanga yakamira pasi rakatsetseka, yozosundidzirwa kwemasekonzi gumi kuitira kuti ifambe yakatwasuka nekumhanya kwe2 m/s.². Hukuru hwekuedza kwakaitika hwaive…
A. 2000 Joule
B. 3000 Joule
C. 6000 Joule
D. 8000 Joule
E. 9000 Joules
Kukurukurirana:
Zvinozivikanwa :
m = 10 kg, t = masekondi gumi, v_o = 0, a = 2 m/s²mu_t =?
Akabvunzwa :
Kuedza (W)?
Jawab :
Verenga kumhanya kwekupedzisira (v)_t):
v_t =v_o + pa = 0 + (2)(10) = 20 m/s

Basa = shanduko musimba rekinetic

Shanduko musimba rekinetic :
= ½ m(v)_t² - v_o²) = ½ (10)(400 – 0) = ½ (10)(400) = ½ (4000) = 2000 Joules
Saka W = 2000 Joules
Mhinduro chaiyo ndiA.