How do I convert from Nm to lb. ft of torque? - Yahoo! Answers

1 in = 0.0254 m 3 in = 0.0762 m F = m x a = 5 kg x 9.81 m/s2 = 49.05 N T = F x d = 49.05 N x 0.0762 m = 3.738 N-m Note- This toque is lower than the motor's stall torque, so this operation is possible using the specified motor, mass, and lever arm 1 RPM x 2π rad/rev x 1 min/60 sec = 0.105 rad/sec ω = 50 rev/min x 0.105 rad/sec/RPM = 5.25 rad/sec P = T x ω = 3.738 N-m x 5.25 rad/sec = 19.622 W I = P/V = 19.622 W/12 V = 1.635 Amps Note- This current is smaller than the maximum allowable current draw of the motor.