Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Latest activity
Register
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
haruspex's latest activity
haruspex
replied to the thread
Shape of Slinky being twirled in 0 gravity
.
That's not how I would put it. The coordinate axes can stay where they are; the spring rotates as though rigid about the x axis.
Today, 5:34 AM
haruspex
replied to the thread
Shape of Slinky being twirled in 0 gravity
.
A stable configuration just means its shape is not changing as it spins. From the diagram, it appears the ends are anchored.
Today, 4:57 AM
haruspex
replied to the thread
Two launches ferrying between two landing stations along a river
.
Clearly not since the difference is ##\Delta t##. But KR is the same in both.
Today, 4:51 AM
haruspex
replied to the thread
Two Trains and a Bee: Distance Question
.
Duplicate of https://www.physicsforums.com/threads/bees-and-trains-a-distance-problem.1063136/#post-7091776, yes? Please do not post the...
Yesterday, 10:57 PM
haruspex
replied to the thread
How can I maximise the exit velocity of an object catapulted up?
.
Maybe start by considering what you can vary. Degree of inflation, relative masses, drop height… Anything else?
Yesterday, 3:46 PM
haruspex
replied to the thread
Extension of spring in a system with two pistons
.
I cannot follow your reasoning from the various expressions scattered around that picture. Let's go back to post #7. I queried the...
Yesterday, 1:03 AM
haruspex
replied to the thread
Magnus Effect Equations and Mechanics
.
It is surely spinning. If it has radius r, velocity v and spins at rate ω, then on the forward spinning side (the underside in your...
Yesterday, 12:07 AM
haruspex
replied to the thread
Magnus Effect Equations and Mechanics
.
Since the expression is in the order ##u_1^2-u_2^2##, ##u_1## must be the side with the greater relative speed to the air.
Monday, 10:27 PM
haruspex
replied to the thread
Magnus Effect Equations and Mechanics
.
The equation considers the side of the ball rotating forwards and the side rotating backwards separately. The pressure each side...
Monday, 8:48 PM
haruspex
replied to the thread
Magnus Effect Equations and Mechanics
.
I don't know how to explain that any more clearly than I already have.
Monday, 8:39 PM
haruspex
replied to the thread
Equation of hyperbola confocal with ellipse having same principal axes
.
The question does not imply there is a unique hyperbola meeting those conditions. The question is whether every such hyperbola...
Monday, 8:29 PM
haruspex
replied to the thread
Magnus Effect Equations and Mechanics
.
Not sure what your thinking is there, but the proximate cause is that the higher pressure acting over the same area implies the greater...
Monday, 8:16 PM
haruspex
replied to the thread
Magnus Effect Equations and Mechanics
.
The equation in fig 3 matches that at https://en.wikipedia.org/wiki/Magnus_effect#Pressure_gradient_force, where all of the variables...
Monday, 8:12 PM
haruspex
replied to the thread
A falling resistive disk in uniform magnetic field
.
Sorry, I didn’t look at the diagram carefully enough. I thought the field was parallel to the axis of the disk.
Monday, 4:09 PM
haruspex
replied to the thread
Force on a rotating wheel/disc
.
because it is "fixed at its centre", which means the bicycle forks are exerting a horizontal force -G on the wheel. While G is where you...
Monday, 4:00 PM
Forums
Back
Top