Physics
Angular Acceleration
Quick fact
A figure skater can increase their spin speed by pulling their arms inward, demonstrating angular acceleration in action.
Why this is interesting
Have you ever noticed how a spinning top slows down over time? What causes that change in motion?
Read the full explanation
Understanding Angular Acceleration
Angular acceleration is the rate at which an object's rotational speed changes. Imagine a bicycle wheel spinning faster and faster—this happens because there’s a force causing it to rotate more quickly. It’s like linear acceleration but for rotation.
A deeper explanation
Angular acceleration occurs when torque (a twisting force) acts on an object with moment of inertia (resistance to rotational change). The greater the torque or the smaller the resistance, the faster the angular acceleration. This principle applies in everything from playground swings to space satellites adjusting their orientation.