Practice: If a torque of 55.0 N.m is required to turn a bolt and the largest force you can exert is 135 N, how long a lever arm must you use to turn the bolt? Torque = r F r = Torque / F r = = 55.0 N.m 135N r = 0.407m Individual Practice! 1. An engine that rotates at 1800 revolutions / minute, in 2 seconds it descends uniformly to 1200 revolutions / minute. What is the angular acceleration? 2. A point on the edge of a rotating disk with a radius of 8m moves through an angle of 37 degrees. Find the length of the arc described by the point. 3. The wheel of a bicycle has a diameter of 66cm and makes 40 revolutions in one minute. What is its angular velocity? How far would the wheel travel? 4. You stand on the pedal of a bicycle. If you have a mass of 65 kg, the pedal makes an angle of 35 above the horizontal, and the pedal is 18 cm from the center of the chain ring, how much torque would you exert? Reference: https://definicion.de/torque/#:~:text=Por%20ejemplo%2C%20si%20se%20dice.a% 202500%20revoluciones%20por%20minuto. http://www.astro.puc.cl/~avalcarc/FIS109A/16_Torque.pdf https://www.publimotos.com/mtips/61-tips_moto/2139-que-es-el-torque