PÖ3. Joonkiirus ja nurkkiirus

Ülesanne. Jalgratas liigub joonkiirusega 12,56 m/s. Jalgratta ratta diameeter on 400 mm. Määrata ratta nurkkiirus, pöörlemisperiood ja pöörete arv sekundis.

Lahendus. Esmalt paneme kirja andmed.

Antud:

v equals 12 comma 56 m over s d equals 400 space m m equals 0 comma 4 space m space left parenthesis r a a d i u s space o n space s e e g a space 0 comma 2 space m right parenthesis minus negative negative negative negative negative negative negative negative negative negative negative omega equals ? f equals ? T equals ?

Kasutame teadaolevaid pöördliikumise valemeid:

omega equals v over r equals fraction numerator 12 comma 56 begin display style m over s end style over denominator 0 comma 2 space m end fraction equals 62 comma 8 fraction numerator r a d over denominator s end fraction T equals fraction numerator 2 pi over denominator omega end fraction equals fraction numerator 2 pi over denominator 62 comma 8 space begin display style fraction numerator r a d over denominator s end fraction end style end fraction almost equal to 0 comma 1 space s f equals 1 over T almost equal to fraction numerator 1 over denominator 0 comma 1 s end fraction equals 10 space H z

VASTUS: Nurkkiirus on 62,8 rad/s, periood 0,1 s ning sagedus 10 Hz.