All Questions
7
questions
2
votes
1
answer
76
views
How to calculate the center of gravity of multiple weights placed along the perimeter of a circle?
We want to attach n various weights to the perimeter of a circular turbine, equidistant from each other.
I thought about using the cosine function of the position, the weight and the radius somehow (...
- 109
1
vote
3
answers
110
views
Show that OC=CD
Imagine a circle with the center of O. OD is the radius of the circle. There is a line tangent to the circle at point B. AB is parallel to the radius. Point C lies on the radius. If angles ABO and OBC ...
- 59
-1
votes
2
answers
418
views
Why is the direction of angle theta in circular motion towards and inwards?
Why is the direction of angle $\theta$ in circular motion towards and inwards of plane x-y axis?
I am not getting this concept at all.As the angel theta is changing ; the arc length (s in diagram ) is ...
- 742
1
vote
1
answer
32
views
Is my modification to this solution valid?
I have the following problem:
I know the center points and radii of three circles. I want to slowly increase each circle's radius until all three circles intersect. They are guaranteed to intersect at ...
- 1,381
0
votes
1
answer
122
views
Reflection in a tube
My initial query was to find the distance, denoted $a$ from the centre, which a light source radiating in all directions (see below, where centre is represented by a black dot and light source by an ...
- 3
0
votes
1
answer
130
views
A question about math behind circle and ellipse made by a line of neutrino (Cherenkov Cone)
A line of Neutrino is moving on the shape. When it moves through something like water, It makes a cone (Cherenkov radiation) which as you see, the line making the cone has angle $\phi$ with the line ...
- 749
1
vote
1
answer
4k
views
Circular motion "calculate the angle"
I have a equation i need to find out how they hang together.
angel = (velocity * time) - (acceleration * time * time / 2)
I know circumference of a circle:
<...
- 113