Question

Ce energie cinetica poseda un peste cu m=20g care de deplaseaza cu v=40m/s ?

Answer 1

Salut,

$E_{cinetic\breve{a}}=\dfrac{mv^2}2=\dfrac{20\cdot 10^{-3}\cdot 40^2}{2}=\dfrac{20\cdot 10^{-3}\cdot 1600}{2}=16\ J.$

Green eyes.