Rotational speed is the measure of how fast an object is rotating around an axis. It is typically measured in revolutions per minute (RPM) or radians per second (rad/s).
Rotational speed can be calculated by dividing the angle of rotation by the time it takes to rotate. This can be expressed as RPM = (Δθ / Δt) x (60/2π) or rad/s = Δθ / Δt.
The factors that affect rotational speed include the size and shape of the object, the mass and distribution of the object's mass, and the force applied to the object.
Rotational speed and angular velocity are directly related. Angular velocity is the rate at which an object changes its angular position, while rotational speed is the measure of how fast an object is rotating. They are related by the formula ω = v/r, where ω is angular velocity, v is tangential velocity, and r is the distance from the object to the axis of rotation.
Rotational speed is used in many real-life applications, such as in engines, turbines, and motors. It is also used in sports to measure the speed of a spinning ball, and in industries to measure the speed of machines and equipment. It is also important in understanding the movement and behavior of celestial bodies, such as planets and stars.