Question

Ce energie cinetica are un corp cu masa de m=10 kg eu cu viteza v=20m/s

Answer 1

$E_c=\frac{mv^2}{2} =\frac{10*400}{2}=2000J$

Answer 2

Răspuns:

$\bf\blue{E_c=2000\:J}$

Explicație:

$\bf\red{\boxed{E_c=\frac{m\times v^2}{2}}}$

$E_c=\frac{10\:kg\times20^2\:\frac{m}{s}}{2}=\frac{10\times400}{2}=\frac{4000}{2}^{(2}=\bf\blue{2000\:J}$