# Recent content by schaafde

1. ### Center of mass of a two rod system

Homework Statement Given that I have a system with a rod of diameter 1 1/2 inches with a length of 17 in and a weight of 10 1/3 oz and a rod with a diameter of 3 inches with a length of 17 in and a weight of 20 2/3 oz. The two rods are butted together at one end almost looking like a bottle...
2. ### Center of Mass of a system

Given the picture in the attachment of two rods touching with them each being 17 inches long and one weighing double the weight of the other, would it make sense that the center of mass is 2/3 of the way down the picture from the thinner end? Or, am I going about this idea the wrong way?
3. ### Two rods

So i calculated the center of mass to be 2/3 of the way up the "object" which would make it in the bigger rod? Would I be correct in assuming that? I am going off the fact that a uniform rod would have its center of mass directly in the middle.
4. ### Two rods

Would that be the same for finding the moment of inertia for that system? just find the moment of inertia for each individual rod and average them together?
5. ### Two rods

I am currently trying to find the center of mass of two rods. One rod is 20 2/3 oz and is 17 inches long with a diameter of 3. The other rod is 10 1/3 oz and 17 inches long with a diameter of 1 1/2 The bigger rod is touching the smaller one if they were both standing up. It looks almost like a...
6. ### How do I find the center of mass of a cone?

because I came across something called the Riemann Stieltjes integral and it is making no sense to me
7. ### How do I find the center of mass of a cone?

Im trying to figure out the center of mass of a cone for this research I'm doing. How do I find the center of mass of a cone?
8. ### Bat Speed vs Angular Velocity

So, I would just take those calculations to where F/m is the greatest? I'm not seeing exactly how the sweet spot came into calculation.
9. ### Rotation about a free axis

Let's say I have a uniform rod lying on a table in a frictionless environment. Now I throw a ball with a certain velocity at one end of the bat. How can I describe the motion of that bat. I need to make it seem like it is going in a circle. I know it will move back and rotate but I don't know...
10. ### Bat Speed vs Angular Velocity

In that equation for angular velocity, would the angular velocity be measured in radians per second or RPM or some other unit?
11. ### Describing the circle of a uniform rod hit at one end

I understand that but the radius should be longer than the length of the bat because the bat is not pinned at one end. Therefore the center of the circle isn't at the end of the bat. I guess I am asking where is the center of the circle and how would I calculate that new radius.
12. ### Describing the circle of a uniform rod hit at one end

yes if the ball hit the bat and the bat rotated around in a circular motion. How would i describe that circle?
13. ### Describing the circle of a uniform rod hit at one end

I have a uniform rod laying on a table. A ball comes in and hits the rod making it move backwards but also rotating. Assuming that we are in a frictionless environment, how do describe the circle made by the rod?
14. ### Bat Speed vs Angular Velocity

It isn't from a question. I am conducting research on the sweet spot of a baseball bat. I am trying to determine angular momentum for the bat. I have taken the average bat speed of a college baseball player but I need to translate that into angular velocity.
15. ### Bat Speed vs Angular Velocity

If I have a bat speed of 74mph, how do I figure out how much angular speed that has? I cannot find a conversion or an equation anywhere.