Investigate one factor affecting the terminal speed of spheres falling in a liquid
Background: In physics, terminal velocity is when the acceleration of the object becomes constant due to the other forces around, such as gas or liquid. When the gravity force and the drag force become equal, the free falling object’s velocity is called terminal velocity. This means that the acceleration of the object is constant. When the object accelerates, the drag force increases. At certain speed, the drag force becomes same as the mass of the object. At this point, the object’s acceleration stops and it starts to free fall with the terminal velocity. Bigger mass leads to bigger terminal velocity, however, bigger drag force leads to smaller terminal velocity.
