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Work Example 2
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This web page is an interactive physics problem on work and forces. ...

This web page is an interactive physics problem on work and forces. A simulation shows the motion of an object sliding on a surface with friction and external forces. The student is asked to determine the forces and construct a free body diagram. This is part of a collection of similar simulation-based student activities.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Magnetic Field Demonstration 2
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This web page is an interactive physics simulation on magnetic fields and ...

This web page is an interactive physics simulation on magnetic fields and forces. The user can create a magnetic field and place in it current carrying wires. The simulation will display the field these wires create, and the forces they experience. Double-clicking the mouse at any point on the field will produce a field line passing through that point. This item is part of a larger collection of introductory physics simulations developed by the author. This is part of a collection of similar simulation-based student activities.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Coulomb's Law in 2D: Force is a Vector!
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This Physlet based simulation provides the users with three charge configurations for ...

This Physlet based simulation provides the users with three charge configurations for charges on the corner of square acting on a charge in the middle of the square. The user is to determine the sign of the charges at the corners based on the net force acting on the middle charge.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Accelerating Car
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This web page is an interactive physics problem on rotational friction. The ...

This web page is an interactive physics problem on rotational friction. The user can control whether friction is present, and see how it affects the motion of a car attempting to accelerate. This is part of a collection of similar simulation-based student activities.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
AC Circuit
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This web page is an interactive physics simulation on alternating current circuits. ...

This web page is an interactive physics simulation on alternating current circuits. A circuit with a resistor, inductor, capacitor, and AC source is shown, and the user can see how the voltages across them change as the frequency of the AC generator changes. This item is part of a larger collection of introductory physics simulations developed by the author. This is part of a collection of similar simulation-based student activities.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Ballistics cart
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The simulation shows a ballistics cart. If the cart is at rest ...

The simulation shows a ballistics cart. If the cart is at rest on a horizontal surface, it will shoot a ball straight up in the air, and catch the ball again. What if, as in this simulation, the cart is traveling at a constant velocity horizontally, instead? Will the ball land ahead of the cart, in the cart, or behind the cart? Note that the cart fires the ball straight up, with respect to the cart, when the middle of the cart passes the small vertical trigger on the track.
Use the buttons to select the different modes (whether there is a tunnel or not, and whether to show the velocity vectors).

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Ball on a String
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This web page is an interactive physics homework problem relating to circular ...

This web page is an interactive physics homework problem relating to circular motion. A simulation depicts a ball on a string being whirled at constant speed. Given mass of the ball and tension in the string, students are asked to find the speed. The user has options to view an author-created free-body diagram and coordinate system. Explicit help is provided to find a solution by applying Newton's Second Law. This item is part of a collection of similar simulation-based activities developed for students of introductory physics.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Block on a Spring
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This interactive simulation models the motion of a block attached to an ...

This interactive simulation models the motion of a block attached to an ideal spring that oscillates horizontally. Students can set the mass of the block, the initial position, spring constant, and damping. Motion graphs plot the block's position, speed, and acceleration as a function of time, and energy bar graphs are also displayed. This applet was created with EJS, <i>Easy Java Simulations</i>, a modeling tool that allows users without formal programming experience to generate computer models and simulations. <b>SEE RELATED ITEMS</b> on this page for a link to the full index of Andrew Duffy's EJS simulations.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Boston University Easy Java Simulations: A Charge in Electric and Magnetic Fields
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This interactive simulation allows users to explore forces exerted on a single ...

This interactive simulation allows users to explore forces exerted on a single charged particle by electric and/or magnetic fields. Fields can be turned on or off, giving users a view of how the particle is affected by exposure to one or both. Users may set initial velocity of the particle and also control the direction of either field. Also included by the author is a set of suggested activities to accompany the simulation. This simulation was created using the Easy Java Simulations (Ejs) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Ejs is a part of the Open Source Physics Project and is designed to make it easier to access, modify, and generate computer models. Additional Ejs models can be found by searching ComPADRE for Open Source Physics, OSP, or Ejs.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Boston University PhysLets: Coulomb's Law
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This interactive resource from the physics department at Boston University illustrates Coulomb's ...

This interactive resource from the physics department at Boston University illustrates Coulomb's law. The simulation allows the user to graph the dependence of the Coulomb force on the distance between charges.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Center of Mass
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This web page is an interactive physics problem on center of mass. ...

This web page is an interactive physics problem on center of mass. The student is asked to find the center of mass for a given set of variables, and can check their answer with the attached Java simulation. The user can then use the Java simulation to see how changing any of the masses changes the center of mass. This is part of a collection of similar simulation-based student activities.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Circular Motion-A Ball on a String
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This web page is an interactive physics simulation relating to circular motion. ...

This web page is an interactive physics simulation relating to circular motion. The system is a ball on a string, rotating in a circle perpendicular to gravity. The user can change the mass of the weight, or the tension in the string. The ball's velocity and angle relative to the string are calculated and displayed. This item is part of a larger collection of introductory physics simulations developed by the same author. This is part of a collection of similar simulation-based student activities.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Collisions in One Dimension
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In this interactive simulation, users collide two balls traveling along a line ...

In this interactive simulation, users collide two balls traveling along a line to investigate whether momentum and kinetic energy are conserved in the collision. Values for mass, initial velocity, and elasticity can be controlled by sliders. Users must calculate and enter the momentum and kinetic energy of each ball after the collision. Answers may be checked for immediate feedback. This applet was created with EJS, <i>Easy Java Simulations</i>, a modeling tool that allows users without formal programming experience to generate computer models and simulations.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Constant acceleration, same physics
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The simulation shows five different motions in which objects experience constant acceleration, ...

The simulation shows five different motions in which objects experience constant acceleration, starting from rest. Although each motion is different, the underlying physics is the same. What features of the simulation reinforce the idea that the physics is the same?

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Constant Velocity vs. Constant Acceleration
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This simulation shows the difference between Constant Velocity vs. Constant Acceleration هذه ...

This simulation shows the difference between Constant Velocity vs. Constant Acceleration هذه المحاكاة تبين الفرق بين السرعه الثابته والتسارع المستمر في الفيزياء

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Cyclic Processes
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This web page is an interactive physics simulation on cyclic processes. The ...

This web page is an interactive physics simulation on cyclic processes. The user can put an engine through four steps, returning it to its original conditions. The work done by the engine is graphed after each step, showing the net work done. This is part of a collection of similar simulation-based student activities.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Displacement and Pressure in a Sound Wave
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This web page is an interactive physics animation that explores the relationship ...

This web page is an interactive physics animation that explores the relationship between displacement and pressure in sound waves. Users can watch two graphical displays to observe how pressure change is produced by oscillations of the wave particles. Action may be viewed in steps or continuous play. This item is part of a larger collection of simulation-based activities developed for students of introductory physics.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Dissecting the SHM Equation
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This web page is an interactive physics animation relating to simple harmonic ...

This web page is an interactive physics animation relating to simple harmonic oscillation. Two spring oscillators are displayed with a choice of three views: different amplitudes, different frequencies, or different phases. The user can observe changes in the graphs as a function of each. Included is an analysis of the SHM general equation based upon the graphs displayed. This item is part of a collection of similar simulation-based activities for students of introductory physics.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy