Recent content by aigerimzh

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    Physical pendulum made of a uniform disk

    Thanx! Very Much)
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    Physical pendulum made of a uniform disk

    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
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    Wheel attached to a fixed shaft

    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...
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    Solving for Rotational Velocity of a Ring and Bug System | Homework Question

    It is in attached picture
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    Solving for Rotational Velocity of a Ring and Bug System | Homework Question

    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...
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    Particle moving with radial velocity

    Can somebody answer me?
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    Particle moving with radial velocity

    Can I find acceleration by a=v\Theta/(1-cos\Thetat)?
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    Particle moving with radial velocity

    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...
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    How can A be expressed in terms of n as a unit vector?

    I think that (Axn)xn= aj?
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    How can A be expressed in terms of n as a unit vector?

    Yes, here also I mean (Axn)xn
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    Vector perpendicular to two vectors

    I mean AxB, and (AxB) means length of AxB. Do mean that my answer is not correct?
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    Vector perpendicular to two vectors

    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?
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    How can A be expressed in terms of n as a unit vector?

    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
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    Vector from origin and two points/please explain how to solve it

    Thanks a lot! But I can not understand a question. What should I find? Components of vector A? Or?
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    Vector from origin and two points/please explain how to solve it

    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...