N01. Newtoni 2. seadus

Ülesanne. Kehale mõjus jõud 0,15 kN, mille mõjul ta hakkas liikuma kiirendusega 3 cm/s2. Leia keha mass.

Lahendus. Esmalt paneme kirja andmed.

Antud:

F equals 0 comma 15 space k N equals 150 space N a equals 3 fraction numerator c m over denominator s squared end fraction equals 0 comma 03 m over s squared minus negative negative negative negative negative negative negative negative negative negative negative m minus ?

 

Kasutame Newtoni 2. seadust, mille teisendame sobivale kujule, st avaldame sealt massi:

a equals F over m rightwards double arrow m equals F over a equals fraction numerator 150 space N over denominator 0 comma 03 space begin display style m over s squared end style end fraction equals 5000 space k g.

VASTUS: Keha mass on 5000 kg.