think of a engine. it has a flywheel and a rod connected to it. a string had been totally wrapped around the rod and a mass is hanged from the very end of the rod. the system is in equilibrium. but as the engine starts to rotate, the rod with rotate as well and cause the hanged object to go...
Homework Statement
A system has a ball and a uniform rod. The rod is rotating about point X on a frictionless table until it strikes the ball. The rod stops and the ball moves away.
Variables:
Rod's mass: m1
Ball's mass: m2
Rod's original angular velocity: ω
Ball's final velocity: v
Rod's...
Homework Statement
AB is a rod of length 10 m that is leaning against the wall. Given variables are shown in the diagram. Find angular velocity of A wrt B.
https://imgur.com/a/8bEdYhN
I have a doubt in one step that I will highlight in "The attempt at a solution" part.
Homework Equations...
I have a fundamental question about the antennas made by using dielectric materials that I have not found a satisfied answer online. According to Wikipedia, antennas are described as,
"In radio, an antenna is the interface between radio waves propagating through space and electric currents...
Hi everyone,
First post here. Been out of school for a while and quite rusty, but always had an interest in physics, and was pretty good back in the day.
Can anyone help me understand the physics of fishing rods?
How to look at a fishing rod in terms of physics and mechanics? (i.e. is it a...
Homework Statement
A uniform rod (length = 2.4 m) of negligible mass has a 1.0-kg point mass attached to one end and a 2.0-kg point mass attached to the other end. The rod is mounted to rotate freely about a horizontal axis that is perpendicular to the rod and that passes through a point 1.0...
In this video, a man applies an angular acceleration to the base of a rod. While the rod rotates, it bends. Why? What force is there that causes the bending, aside from rod's own weight? It seems to me to be the work of a fictitious inertial force. I was always taught that those forces don't...
Homework Statement
Hi. I ve got a problem, where I have to show torque by integrating the weight of the rod over the whole it's length.
Homework Equations
[/B]
Result, what I am suppose to get is:
## \tau_{rod} = \frac{mgb}2 ##
The Attempt at a Solution
[/B]
When I try to integrate, Im...
Homework Statement
An example in my problem set (homework help) An oak rod is hung from a rigid support.
The rod has a diameter = 12 mm, length = 9 m, and a catch plate at its base.
a) The maximum mass of a weight that each rod can support.
b) The minimum mass of a weight that will break the...
Homework Statement
Two thin glass rods are placed side by side 4.70 cm apart as shown in the diagram below. They are each 11.3 cm long and are uniformly charged to +10.4 nC .
Answer the questions below regarding the electric field along a line which is drawn through the middle of the two glass...
Homework Statement
B = 0.02T
L = 40 cm
w = 10 rad/s
a: Electromotive force between O and C = ?
b: If electromotive force is the same - so what is the velocity?
I found 2 ways of solution. See "3. The Attempt at a Solution "
Homework Equations
φ = BA
ε = -dφ(t)/dt
The Attempt at a...
Homework Statement
Consider one rod of length L which is spun at its center perpendicular to its length; it will have a certain moment of inertia. Now, if the same rod is folded in the middle creating a certain angle and still spun at its center, what happens to its moment of inertia?
Homework...
Homework Statement
The 3.0 kg rod has a length of 80 cm. The 4.0 kg rectangle attached to the rod has negligible dimensions. The entire object rotates counterclockwise about the bottom of the rod. Determine the angular speed of the apparatus at the instant the rod is horizontal...
I'm trying to solve this problem, however I'm unsure if my reasoning is correct - I do agree with the answer, but something seems wrong to me in my reasoning.
1. Homework Statement
A rod is on a frictionless surface, and is defined by the length L and mass M. It is hit on one end by a piece...
Homework Statement
There is a cyllinder with radius 0.5 m fixed on the wall. We put a 6 metres long thin rod with mass 0.3 kg on it, which does not slip. I would like to calculate the oscillating time. It is a part of a clock, so the oscillating time is probably 1 or 2 seconds, but I got...
1. Homework Statement :
A rod of length l is vertically standing on a friction less surface.
It is slightly disturbed from this position. Let w(omega) and alpha be the angular speed and angular acceleration of the rod, when it turns through an angle theta, then find the value of acceleration...
Homework Statement
Hello,
I am looking to determine the moment of inertia for the cantilever beam pictured below. I want I to be a function of L1 and T1.
Known variables: L, D, P, t
Dependent variables: T2, L2
Design variables: T1, L1
Homework Equations
L2 = L - L1
T2 = T1 - t
Standard...
Homework Statement
[/B]
The diagram shows a thin rod of uniform mass distribution pivoted about one end by a pin passing through that point. The mass of the rod is 0.380 kg and its length is 2.50 m. When the rod is released from its horizontal position, it swings down to the vertical position...
Homework Statement
We had this elementary experiment in class. An aluminium rod is fixed at one end and at the other end you have a disk. You hand increasingly heavy weights on the disk and measure how much the rod shears (twists). We were asked to make a graph of the shear torque vs. angle of...
1. Homework Statement
Calculate the resultant electric field acting on some point ##x##. The electric field is generated by a long thin rod and the line charge density is given. ##p_l=\frac{dQ}{dL}##
Homework Equations
3. The Attempt at a Solution [/B]
I have uploaded two images, one of the...
Homework Statement
A thin stick of mass M = 2.8 kg and length L = 2.2 m is hinged at the top. A piece of clay, mass m = 0.8 kg and velocity V = 2.7 m/s hits the stick a distance x = 1.65 m from the hinge and sticks to it.
Q2: What is the ratio of the final mechanical energy to the initial...
Homework Statement
A straight circular plastic cylinder of length L and radius R (where
R ≪ L)
is irradiated with a beam of protons so that there is a total excess charge Q distributed uniformly throughout the cylinder. Find the electric field inside the cylinder, a distance r from the center...
Homework Statement
Uniform rod rotates at axel. What is the total kinetic energy of the rod?
Homework Equations
deltaKrot = 1/2Iw^2
deltaKtrans = 1/2mv^2
The Attempt at a Solution
I believe the rod has both rotational as well as translation energy because the rod is not rotating about its...
Why the Shapiro time delay is calculated with respect to the difference in coordinates and not with respect to the physical distance?
I follow the discussion of Clifford (Theory and Experiment in Gravitational Physics) which uses isotropic coordinates and PPN approximation.
To make more clear my...
Hello Every one
I want to know how the pressure applied at a particular point on a rod will be equally divided underneath of the rod. What materials are good to achieve this kind of situation?
Homework Statement
Brittle materials as glass and ceramics have generally a much lower tensile strength than compressive strength. A rigid mass impacts the end of a bar (free-free) of such a material and a piece of the other end drops off. Is there a relation between the length of the piece...
Homework Statement
Picture of problem is attached
A rod of length L lies along the positive y axis from 0<=y<=L, with L = 0.400 m. It has a positive nonuniform linear charge density (charge per unit length) λ = cy2, where c is a positive constant and has a numerical value of 8.00 x 10-7. (a)...
Hi!
I need to figure out the Lagrange Equation for a rod or nail swinging from a horizontal plane. The thing is, that while it is swinging back and forth, the while nail is moving along the X axis as well. I was thinking to use 1/2mv^2+(1/2)Iø^2 . Any help would be appreciated!!
Thanks.
Homework Statement
The thin plastic rod shown in the figure has length L = 18.0 cm and a nonuniform linear charge density λ = cx, where c = 14.5 pC/m2. With V = 0 at infinity, find the electric potential at point P1 on the axis, at distance d = 5.10 cm from one end.
Figure is attached...