5. P = ? Bp = 75 cm R = 12 kg Br = 25 cm P * Bp = R * Br P * 75 = 25 * 12. P = 4 kg. P = ? Bp = 30 cm R = 6 kg Br = 5 cm P * Bp = R * Br P * 30 = 6 * 5. P = 1kg. P = 1g Bp = ? R = 300000 g. Bp = 50 cm. P * bp = R * Br 1 . Bp = 300000 * 50 Bp = 15000000 cm = 150 km.
6. Dm = 20 cm Nm = 1000 rpm. dc = 10 cm nc = ?. Dm * Nm = dc * nc. 20 * 1000 = 10 * nc. Nc =2000 rpm. i = 20 / 10. Dm = 5 cm Nm = ? dc = 30 cm nc = 60 rpm. Dm * Nm = dc * nc. 5 * Nm = 30 * 60. Nm =360 rpm. i = 5 / 30.