However, the solar system contains more than one mass. In fact, it started as a large dust cloud without planets or suns, and every point of dust had a fascinating interaction with every other point. There’s a lot of complexity going on, but there are tricks you can use to simplify it. If the dust is evenly distributed, particles on the outside of the cloud will experience gravity as if all the other dust were concentrated at a single point in the center of the cloud.
So what does this giant dust cloud do? Well, each part experiences a force pulling towards the center of the cloud. It would essentially collapse on itself. To see what this would look like, we built a computational model using 100 masses to represent all the dust. This will look like this:
Video: Rhett Alleyne
Of course, it doesn’t look like our solar system. The reason is that the dust cloud that formed our solar system began with a slight rotation. Why is that important? To answer that, we have to consider what happens when an object moves in a circle.
spinning around
Imagine tying a ball to a string and swinging it around in a circle. As the ball moves, its speed changes direction. This ball must have an acceleration because we define acceleration as the rate of change of velocity. Even if it is moving at a constant speed, it will accelerate because it moves in a circular motion. We call this centripetal acceleration. This literally means “pointing to the center” since the direction of the acceleration vector is towards the center of the circle. You see, sometimes words have meaning.
The magnitude of this centripetal acceleration can also be found. It depends on both the speed of movement of the object (v) increases speed around the circle and the radius of the circle (r). However, in some cases it may be more convenient to describe circular motion as follows: angular Speed (ω).
Measurement of linear velocity (v) Where until Objects move in units of time (for example, meters per second).Measuring angular velocity how much is a yen passes within unit time. How can we measure it? If you draw a line from the center of the circle to the starting point and another line to the position of the ball 1 second later, these two lines define an angle. Therefore, angular velocity measures the angle covered by the ball (in radians/second). This basically tells you how fast the object rotates around its center point. This gives us two definitions of centripetal acceleration (bec).