If the ball hit the drill and reflects what will happen to the stick? If you said that the stick would move on the right, you are right. We can think about it as a collision. When two objects collide, they exert strength. And according to Newton, the forces are equal and opposite, maintaining the total shoot of the ball system. We define the rush as the product of the mass and speed of the object.
Because the ball is reflected, the only way to keep the rush is to recover. (I know, my configuration of this thought experiment will make it quite indigent sports viewers, but stay with me – it will aid us understand what is happening in a sweet place).
Collision outside the center
Ok, go to attract a stick and bring him back to the starting position. The ball is again fired towards the stick. However, this time it is directed instead of the center. Yes:
The stick is still moving on the right, but now too turns About his center, right? Why is this happening? Well, the momentum is still preserved, but now there is another preserved quantity – momentum. The angular rush is very similar to the ordinary senior momentum, except that it concerns rotary motion instead of linear motion.
While the linear rush depends on the weight and speed of the object, the angular rush is equal to the product of the angular speed of the object and its inertia. The moment of inertia is like rotary mass – it depends not only on the mass of the object, but also the method of distributing this mass. So, after the stick moves away from the ball hit, it clearly has a angular rush because it turns.
But what before the collision? The stick does not rotate and there is no angular rush, so to preserve the angular rush ball Must have a angular rush. Yes, the mass may have a angular rush, even if it does not rotate. (This is one of those moments when physics seems strange.) The angular rush of the ball depends on its linear shoot AND where he hits the stick.