I11. Asteroidi kineetiline energia

Ülesanne. Esimene asteroid, mis avastati, oli Ceres. Selle mass on 3.1021 kg ning orbitaalkiirus 17900 m/s. Milline on Cerese kineetiline energia?

Lahendus.

Paneme kirja andmed:

m equals 3 times 10 to the power of 21 space k g v equals 17900 m over s minus negative negative negative negative negative negative negative negative E subscript k minus ?

 

Kineetilise energia definitsioon:

E subscript k equals fraction numerator m v squared over denominator 2 end fraction equals fraction numerator 3 times 10 to the power of 21 k g times left parenthesis 17900 begin display style m over s end style right parenthesis squared over denominator 2 end fraction almost equal to 4 comma 8 times 10 to the power of 29 space J

VASTUS: Cerese kineetiline energia on 4,8.1029 J.