Recent content by aigerimzh

Thanx! Very Much)

Homework Statement A physical pendulum is made of a uniform disk of mass M and radius R suspended from a rod of negligible mass. The distance from the pivot to the center of the disk is l. What value of l makes the period a minimum? Homework Equations The Attempt at a Solution

Homework Statement A wheel is attached to a fixed shaft, and the system is free to rotate without friction. To measure the moment of inertia of the wheel-shaft system, a tape of negligible mass wrapped around the shaft is pulled with a known constant force F. When a length L of tape has...

It is in attached picture

1. Homework Statement A ring of mass M and radius R lies on its side on a frictionless table. It is pivoted to the table at its rim. A bug of mass m walks around the ring with speed v, starting at the pivot. What is the rotational velocity of the ring when the bug (a) is halfway around and...

Can somebody answer me?

Can I find acceleration by a=v\Theta/(1-cos\Thetat)?

Homework Statement A particle moves in a plane with constant radial r=4m/s. The angular velocity is constant and has magnitude \Theta=2rad/s. When the particle is 3m from the origin, find the magnitude of the velocity and the acceleration. Homework Equations The Attempt at a...

I think that (Axn)xn= aj?

Yes, here also I mean (Axn)xn

I mean AxB, and (AxB) means length of AxB. Do mean that my answer is not correct?

Homework Statement A=(i+j-k) B=(2i-j+3k) Need to find vector perpenducilar to them Homework Equations The Attempt at a Solution I've solved by finding A*B and then divided it to (A*B), the result was W=2i/\sqrt{38}-5j/\sqrt{38}-3k/\sqrt{38}. Is it correct?

Homework Statement Let A be an arbitrary vector and let n be a unit vector in some fixed direction. Show that A=(A.n).n+(A*n)*n Homework Equations The Attempt at a Solution I know that (A.n).n gives component of arbitrary vector, assume that it equals to Ax

Thanks a lot! But I can not understand a question. What should I find? Components of vector A? Or?

Homework Statement Consider two points located at r1 and r2, separated by distance r=(r1-r2). Find a vector A from the origin to a point on the line between r1 and r2 at distance xr from the point at r1, where x is some number Homework Equations The Attempt at a Solution I have no...