Homework Statement
A stick of mass M, length L, stands upright on a table, pivoted to the table.
What is the angular velocity as it hits the table?
Homework Equations
ang. accel = (3g/2L)cos theta
w = (3g/2L) integral cos theta dt
The Attempt at a Solution
theta (t) = ...
Homework Statement
A stick of mass M, length L is standing upright on a table, pivoted at the bottom.
What is its angular velocity as it hits the table?
Homework Equations
ang. accel = (3g/2L)cos theta (theta is zero with stick laying on table)
The Attempt at a Solution...
All --
With a meter stick standing straight up and pivoted at the *bottom*, what is
the final angular velocity as it hits the table?
I've found plenty of standard stuff on physical pendulums (meter stick
pendulum), where I = 1/12 MR^2, period, etc, but I can't find velocity info...
I have asserted that Newton's Cradle does not demonstrate specifically that P = mv or that E = 1/2mv^2.
Rather, that it demonstrates only that two *different* laws of motion/conservation are simultaneously at work.
An alternative form of this assertion is that by observing Newton's...
re Russ Watters:
An air conditioner IS a heat pump -- just turn it around in the window!
iiuc, modern combination A/Cs-heat pumps (Mitsubishi's/Fujitsu's, etc) don't mechanically switch air flows, they re-route the refrigerant through different coils, or some such thing.
To the OP, when you...
I think part of the problem is that energy/momentum/collision equations say little or nothing about forces themselves, but only as a force in integrals of Fdt and Fdx. Thus, F by itself is poorly constrained.
However, by making dx, dt, and V all essentially zero, maybe now somehow F is...
A weird collision "theorem"
All --
Many moons ago I thought I heard a professor refer to a "theorem" in mechanics which stated that if a hard object is released from an infinitesimal height above a hard surface, the force will be exactly twice the weight of the object.
Did I hear...