Question

viteza unui corp ce poseda impulsul egal cu 2 kg m/s este egal cu 72km/h cu ce este egala energia lui cinetica

Answer 1

$E_c=\dfrac{mv^2}2=\dfrac{pv}2=\dfrac{2\ kg\ m/s\ 72\ km/h}2=\dfrac{2\ kg\ m/s\ \dfrac{72000}{3600}\ m/s}2=\\\\=\dfrac{2\ kg\ m/s\ 20\ m/s}2=20\ J,$

Green eyes.