Uma polia com diâmetro de 320 mm, força inicial de F₁=945 N, gira a 1620 RPM. O ângulo de contato dessa polia é de 1920 e o coeficiente de atrito e...

Para calcular a potência transmitida pelo sistema, podemos usar a fórmula: \[ P = \frac{2\pi N T}{60} \] Onde: - \( P \) é a potência em watts - \( N \) é a rotação por minuto (RPM) - \( T \) é o torque em Nm (Newton-metros) Primeiro, precisamos calcular o torque \( T \). O torque pode ser calculado usando a fórmula: \[ T = F \cdot r \] Onde: - \( F \) é a força em Newtons - \( r \) é o raio da polia em metros Dado que o diâmetro da polia é de 320 mm, o raio é metade desse valor, ou seja, 160 mm = 0,16 m. Calculando o torque: \[ T = 945 \times 0,16 = 151,2 \, Nm \] Agora, podemos calcular a potência: \[ P = \frac{2\pi \times 1620 \times 151,2}{60} \] \[ P = \frac{2\pi \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,1416 \times 1620 \times 151,2}{60} \] \[ P = \frac{2 \times 3,141