Resposta:
A. 1020 J
Explicação:
[tex]m = 6 \: kg \\ vo = 12 \: m/s \\ v = 22 \: m/s \\ \tau = {?} [/tex]
[tex] \tau = \frac{mv {}^{2} }{2} - \frac{mvo {}^{2} }{2} \\ \tau = \frac{6 \times 22 {}^{2} }{2} - \frac{6 \times 12 {}^{2} }{2} \\ \tau =3 \times 484 - 3 \times 144 \\ \tau = 1452 - 432 \\ \tau = 1020 \: j[/tex]
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Resposta:
A. 1020 J
Explicação:
[tex]m = 6 \: kg \\ vo = 12 \: m/s \\ v = 22 \: m/s \\ \tau = {?} [/tex]
[tex] \tau = \frac{mv {}^{2} }{2} - \frac{mvo {}^{2} }{2} \\ \tau = \frac{6 \times 22 {}^{2} }{2} - \frac{6 \times 12 {}^{2} }{2} \\ \tau =3 \times 484 - 3 \times 144 \\ \tau = 1452 - 432 \\ \tau = 1020 \: j[/tex]