Kinetic Energy Material muRotational Motion
Zvinhu zviri kufamba mumutsara wakatwasuka zvine simba rekufamba izvo zvinogona kuverengerwa uchishandisa fomura:
EK = ½ mv2
Information :
EK = simba rekinetic (mayuniti epasi rose ari kg m2/s2 kana Joule)
m = huremu (chikamu chepasi rose ikirogiramu, kg yakapfupikiswa)
v = kumhanya (chikamu chepasi rose imita/sekondi, chakapfupikiswa m/s)
Huwandu hwemuviri mukufamba kwese kwese hwakafanana ne huremu (m) pada kufamba kwakatwasuka ndizvo nguva yekusaita basa (I)Huwandu hwemuviri mukufamba kwekutenderera hwakafanana ne kumhanya (v) mukufamba kwekutenderera ndiko kumhanya kwekonaSaka, chinhu chinotenderera chine simba rekufamba kwemhepo rinogona kuverengerwa uchishandisa fomura iyi:
Muenzaniso wezvinetso
1. Chidimbu chimwe chine nguva yekusasimba kwe2 kg m2 inotenderera nekumhanya kwekona kwe10 rad/s. Tsvaga simba rekinetic rechikamu!
Kukurukurirana
2. Chidimbu chine huremu hwe1 kg chiri pamamita maviri kubva padenderedzwa rekutenderera, chichitenderera nekumhanya kwe4 rad/s. Tsvaga simba rekinetic rechidimbu!
Kukurukurirana
Zvinozivikanwa :
Huremu hwechinhu (m) = 1 kg
Kureba kwechikamu kusvika kuchikamu chekutenderera (r) = mamita maviri
Kumhanya kwechikamu chepakati = 4 rad/s
Akabvunzwa Chii chinonzi kinetic energy (EK) yechinhu kana chichitenderera?
Jawab :
3. Sirinda yakasimba (I = ½ m R 2 ) ine huremu hwe8 kg inotenderera isingatsvedzeri panzvimbo yakati sandara nekumhanya kwe15 m/s. Simba rese rekufamba kwesirinda iri…
Kukurukurirana
Zvinozivikanwa:
Nguva yekusashanda kwe silinda yakasimba (I) = ½ MR 2
Huremu hwesirinda yakasimba (m) = 8 kg
Kumhanya kwesirinda (v) = 15 m/s
Yabvunzwa: Simba rese rekinetic resilinda
Mhinduro:
Simba rekushandura kinetic:
EK = ½ mv 2 = ½ (8) (15 2 ) = (4) (225) = 900 Joules
Simba rekufamba-famba rekinetic:
EK = ½ I ω2 = ½ (½ m R2)(v/R)2 = (¼ m R2)(v)2/R2) = ¼ mv2 = ¼ (8)(152) = (2)(225) = 450 Joules
Simba rese rekinetic:
MaJoules mazana mapfumbamwe + Majoules mazana mana nemakumi mashanu = Majoules zana nemakumi matatu nemakumi mashanu
