Purchase Solution

The work done by force on a rotating disk

Not what you're looking for?

Ask Custom Question

A disk with rotational inertia of 5.0 kg*m^2 and radius of 0.25m rotates on a fixed perpendicular axis through its center. A force of 2N is applied tangentially to the rim. As the disk turns through half a revolution what is the work done by the force?

Attachments
Purchase this Solution
Solution Summary

The solution shows how to cut through the excessive information given in the problem to find the objective.

Purchase this Solution
Free BrainMass Quizzes
Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

The Moon

Test your knowledge of moon phases and movement.

Basic Physics

This quiz will test your knowledge about basic Physics.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

View More Free Quizzes
Related BrainMass Solutions

  • circuile motion and work-enegy theorem

    By Newton's Second Law: F = mv^2/r 3. when the friction is negligible, apply work-energy theorem, the work done by the force F is against the gravity, that is, the gain of the potential energy.

  • Classical Mechanics

    When a rotating disk couples to a stationary one through frictional force, the energy from the rotating disk can transfer to the stationary one.

  • Rotational Dynamics

    A grinding wheel in the shape of a uniform disk of radius 16 cm is rotating at 900 revolutions per minute. The total mass of the wheel is 2.1 kg, which is uniformly distributed.

  • Work done with torque and angular momentum

    All the work done by the motor is converted into kinetic energy. A kinetic energy of a rotating object is given by: E = (1/2) * I * w^2 Where I is the moment of inertia about the rotation axis and w is the angular velocity.

  • Electromagnetic Induction: Induced current in rotating disk

    287365 Electromagnetic Induction: Induced current in rotating disk Assume a rotating (angular velocity W) metal disk located in the x-y plane with a constant magnetic field B perpendicular to the disk.

  • Determine if the disk slips at this instant.

    126347 Determine if the disk slips at this instant. Problem # 9 - The semicircular disk having a mass of 10 kg is rotating at  = 4 rad/s at the instant  = 60 .

  • Newton's Law (Merry Go Round)

    The centrifugal force Fc acting on an object with mass m rotating with constant angular velocity  at a distance r from the is: Since Jenna does not fly off, the force she holds with must be equal to the centrifugal force acting on her:

  • Rotation: Moment of inertia and angular velocity.

    How much upward force does support 1 exert on the beam? 3.) The 20-cm-diameter disk in the figure can rotate on an axle through its center. What is the net torque about the axle? In Nm 4.)

  • Producing Siren Sound

    5914 Sound: Calculating the angular speed of a rotating disk A siren can be made by blowing a jet of air through 20 equally spaced holes in a rotating disk. The time it takes for successive holes to move past the air jet is the period of the sound.

View More Related Solutions