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Ballistics cart
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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
Constant Velocity vs. Constant Acceleration
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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
Constant acceleration, same physics
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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
EJS Simulations by High School Physics Teachers
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This web page features a collection of Easy Java Simulations developed by secondary teachers for use in introductory high school physics courses. Topics include astronomy, momentum and collision, projectile motion, Gauss's Law and electric field, special relativity, and more. Each simulation is accompanied by a standards-based lesson plan and printable student guides. Users may run the simulations as a Java applet or may directly download a jar file version. The materials in this collection were created with Easy Java Simulations (EJS), a modeling tool that allows users without formal programming experience to generate computer models and simulations. To modify or customize the model, <b><i>See Related Materials</b></i> for detailed instructions on installing and running the EJS Modeling and Authoring Tool. This resource is part of Project ITOP (Improving the Teaching of Physics), a graduate program offered at University of Massachusetts-Boston. The archived computer models are hosted and maintained as part of the BU Physics Simulation collection.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Elevator physics
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The simulation illustrates the situation of a person in an elevator. The elevator takes the person from one floor to the next floor up.
For this situation, try sketching three free-body diagrams, one for the person, another for the elevator, and a third for the person-elevator system.
First, draw the diagrams for when the system remains at rest. Then, predict whether the free-body diagrams will change (and, if so, how) when the elevator is accelerating up, moving up at constant velocity, and moving up but slowing down (acceleration is down).

The simulation draws the diagrams for all these cases, but make sure you try drawing your own before looking at the simulation's diagrams.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Galileo's ramp with sound
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The simulation beeps each time the ball passes one of the vertical red lines. Just like the bells on Galileo's ramp, the positions of three of the vertical red lines can be adjusted. The first line and the last line are fixed in place, but the sliders allow you to adjust the positions of the second, third, and fourth lines. Move the lines around until the beeps occur at regular time intervals (make sure the sound is on, on your computer or mobile device).

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Motion Diagrams
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?What is Motion Diagrams in one dimension هذه المحاكاة تتحدث عن الحركة في بعد واحد

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Motion with Constant Acceleration
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This simulation is about Motion with Constant Acceleration

هذه المحاكاة تشرح عن الحركة مع التسارع المستمر

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Projectile Motion  set initial velocity components
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This simulation is about Projectile Motion set initial velocity components

هذه المحاكاة تتعلق بحركة المقذوفات - وآلية تحديد مكونات السرعه الأولية.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Projectile Motion  set speed and angle
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This simulation is about Projectile Motion set speed and angle. هذه المحاكاة تتعلق بحركة المقذوفات - السرعه والزاوية

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Projectile Motion  with motion diagram and velocity components
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This simulation is about Projectile Motion with motion diagram and velocity components

, هذه المحاكاة تتحدث عن - حركة المقذوفات , مع عناصر الرسم البياني الحركة والسرعه.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Projectile Motion with motion diagram, velocity components, and graphs
Conditions of Use:
No Strings Attached
Rating

This simulation is about Projectile Motion (with motion diagram, velocity components, and graphs,

هذه المحاكاة هي تتحدث عن حركة المقذوفات ومايتعلق بمخطط الحركة، مكوناته والسرعة، والرسوم البيانية

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Race between a dropped ball and one launched horizontally
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This simulation is showing the Race between a dropped ball and one launched horizontally هذه المحاكاة توضح الفرق بالسرعه بين كرة سقطت من الأعلى الى الأسفل وبين كرة اطلقت من الأسفل الى الأعلى.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Relative velocity: race on a moving sidewalk
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This simulation involves relative velocity in one dimension. It is an out-and-back race between two women. Mia runs on the moving sidewalk, while Brandi runs on the non-moving floor. Under what conditions is the race a tie? Under what conditions does Mia win? Under what conditions does Brandi win?

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Static friction
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In this simulation, you see, on the left, a picture of a box at rest on a table. You can apply a force to the box - note that you set the y-component and the x-component separately. On the right, you can see the full free-body diagram of the box. The free-body diagram shows the gravitational force exerted on the box by the Earth, the normal force exerted by the table, the force that you apply, and, if there is one, the static force of friction. Note that, on the free-body diagram, the force of gravity and the normal force have been shifted horizontally a little so they can be seen more easily. If there is a net force, that is also indicated.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Vector Addition - Component Method
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This web page is an interactive physics problem on vector addition. The page explains the concept of breaking a vector into components and adding them together, and works through an example problem. The attached Java applet visualizes the problem. This is part of a collection of similar simulation-based student activities.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
Whole vectors
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The simulation shows different ways of looking at position and velocity vectors for a ball experiencing projectile motion.

تبين المحاكاة طرق مختلفة للنظر في الموقف وسرعة النقل لحركة المقذوفات

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
The monkey and the hunter
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The simulation shows the classic physics situation of a monkey and hunter.
In this case, the hunter is trying to tranquilize the monkey, so the monkey can be re-located to a better habitat. The monkey is clever - when the tranquilizer dart (in blue) leaves the gun, the monkey (in purple) lets go of the tree branch, and starts to fall straight down. Note that there is a net (not shown) at the bottom to catch the monkey, so the monkey won't get hurt.
How should the gun be aimed so the dart hits the monkey?

You can explore various parameters, including changing the direction the gun is aimed, changing the value of the acceleration due to gravity, and adjusting the dart's launch speed.

Subject:
Physics
Material Type:
Simulation
Provider:
Boston University
Author:
Andrew Duffy
The normal force
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In this simulation, you see, on the left, a picture of a box at rest on a table. You can apply a vertical force (up or down) to the box. On the right, you can see the full free-body diagram of the box. The free-body diagram shows the gravitational force (green) exerted on the box by the Earth, the normal force (purple) exerted by the table, and the vertical force (dark blue) that you apply. Note that, on the free-body diagram, all three forces are along the vertical line passing through the center of the box, but the force of gravity and the normal force have been shifted a little so they can be seen more easily.

هذه المحاكاة تتحدث عن القوة الطبيعية في الفيزياء

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