# How to Calculate the Minimum Force Required to Tighten Car Wheel Lug Nuts?

When it comes to tightening car wheel lug nuts to a specific torque, such as 90 N·m, it is essential to calculate the minimum force required to achieve this torque using a wrench of a certain length. The formula for calculating this minimum force involves understanding the concept of torque and its relationship to force and distance.

In this scenario, where a 20-cm long wrench is used to tighten the lug nuts, the first step is to convert the length of the wrench from centimeters to meters. This conversion is necessary to ensure that all units are consistent for accurate calculations.

Once the length of the wrench is in meters, you can then apply the formula for torque: Force = Torque / Distance. This formula indicates that the force required to achieve a certain torque is directly proportional to the torque value and inversely proportional to the distance from the point where the force is applied.

With a torque requirement of 90 N·m and a wrench length of 20 cm (or 0.2 meters), you can substitute these values into the formula to calculate the minimum force needed. By dividing the torque by the distance, you will arrive at the minimum force required, which in this case is 450 N.

Therefore, by understanding the principles of torque and utilizing the appropriate formula, you can determine the minimum force needed to tighten car wheel lug nuts to a specific torque using a wrench of a known length.