(Originais Teachy 2023) - Question Medium of Physics

A mechanic is using a wrench to tighten the screws on a car wheel. The wrench is 0.5 meters long and the mechanic applies a force of 100N at the end of the wrench, perpendicular to its length. (a) Calculate the torque applied to the nut by the action of the wrench. (b) If the mechanic needs to apply a greater torque to loosen the nut, he can increase the force or increase the length of the wrench. Which of the two increases will be more effective? (c) To loosen the nut, the mechanic decided to use a wrench with a length of 0.75 meters and apply a force of 90N. Determine the torque applied with the new wrench.