Rotational forces, also known as torque, are the forces that cause an object to rotate around an axis. This can be seen when you use a wrench to tighten a bolt; the force applied at a distance from the bolt creates a rotational effect. The amount of torque depends on the strength of the force and the distance from the axis of rotation, which is often referred to as the lever arm. In everyday life, rotational forces are present in many activities, such as turning a doorknob or pedaling a bicycle. The pedals of a bicycle apply force to the crank, which then rotates the chainring and propels the bike forward. Understanding rotational forces helps in designing tools and machines that efficiently utilize these principles for various applications.