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This simulation compares the motion of a ball experiencing uniform circular motion to two different simple harmonic motions, one vertical and one horizontal. The point of the simulation is to show that the horizontal motion of the ball exactly matches that of the ball attached to the horizontal spring, and that the vertical motion of the ball exactly matches that of the ball attached to the vertical spring.

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The object rolls without slipping down the ramp. You can plot the total mechanical energy (purple), gravitational potential energy (red), translational kinetic energy (green), and rotational kinetic energy (blue) as a function of time or position.

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The cylinder's acceleration depends on where the applied force is applied, because the position of the applied force affects both the magnitude and direction of the force of static friction. You may find it couner-intuitive, but in some cases the cylinder can actually accelerate faster than 1.00 m/s/s.

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This is an overhead view of a red-haired girl called Sarah who jumps onto a playground merry-go-round, or turntable. Using the sliders, you can control the location where the girl jumps on, and the masses of the girl and the turntable. We treat the turntable as a uniform solid disk that rotates without friction about the center.

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This simulation demonstrates the role that friction plays in driving a car. In this case, the car is a front-wheel-drive car. With no friction at all, the engine spins the front wheels but the front wheels just slip on the frictionless road and the car does not move.

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The simulation focuses on rolling without slipping, which is the way your tires usually roll when you drive a bike or a car.

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Atwood's machine, showing energy bar graphs

Mass of block 1 (on the left)

Mass of block 2 (on the right)

The simulation shows the flow of energy for an Atwood's machine, which is simply two blocks connected by a string passing over a pulley. Block 1 is the blue block on the left, and block 2 is the red block on the right. You can view the energy from seven different perspectives, ranging from defining the system to be the Earth and the two blocks and the pulley, to just one of the blocks or just the pulley.

Note that the simulation uses 10.0 m/s/s for g.

See if you can make sense of all the different perspectives on energy. Note that, because all parts of the system start from rest, the initial kinetic energies are not shown (all are zero). In some views, you see the work done by gravity on block 1 and/or block 2, or the work done by tension on block 1, block 2, or on the pulley. The labels are either above or below the bars, not beside them. U is gravitational potential energy, W is work, and K is kinetic energy.

Simulation first posted on 8-30-2016. Written by Andrew Duffy

This work by Andrew Duffy is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
This simulation can be found in the collection at http://physics.bu.edu/~duffy/classroom.html.
The counter has been running on this page since 8-10-2018. The number of people accessing the page since then is:

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Atwood's machine, showing energy bar graphs Mass of block 1 (on the left) Mass of block 2 (on the right) The simulation shows the flow of energy for an Atwood's machine, which is simply two blocks connected by a string passing over a pulley.

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The simulation illustrates an Atwood's machine, which is simply two blocks connected by a string passing over a pulley. Unlike the previous version of the simulation, in which the mass of the pulley was negligible, here we account for the mass of the pulley.

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The simulation shows the flow of energy for a block that is connected to a pulley by a string wrapped around the outside of the pulley. The subscript 1 refers to the block, and p refers to the pulley.

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Note that the pulley has two additional forces that are not shown. These are the downward force of gravity, and the upward normal force (which must balance the downward forces) - they are omitted because, passing through the center of the pulley, they do not contribute to the torque about the center.

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This is a simulation of a hinged rod in static equilibrium. The top picture shows the rod, supported by a hinge (in red) at the left end and a blue string at some point along the rod.

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This is a simulation of a hinged rod in static equilibrium. The top picture shows the rod, supported by a hinge (in red) at the left end and a blue string at some point along the rod.

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The simulation shows a beam resting on two triangular supports. There is a second copy below that, showing the free-body diagram of the beam. The beam in the free-body diagram will turn red if the situation is unstable, indicating that the beam is in danger of tipping over.

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You can see the ball's motion diagram, with the position marked at 0.5 s intervals. You can also see the disk's motion diagram, with the position marked at 0.5 s intervals. You can then either see graphs of the ball's position, velocity, and acceleration, all as a function of time, or graphs of the disk's angular position, angular velocity, and angular acceleration, all as a function of time.

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Momentum and Angular Momentum of the Universe

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Torque, Levers, and the Universal Law of Rotation

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Investigate how torque causes an object to rotate. Discover the relationships between angular acceleration, moment of inertia, angular momentum and torque.

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Uploaded by Treccani Scuola on 2016-11-25.

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Il momento di inerzia - Il momento angolare

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Uploaded by Treccani Scuola on 2016-11-12.

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Tre studenti di ingegneria presentano due esperimenti di fisica sulla meccanica classica, il primo sulla conservazione del momento angolare ed il secondo su una curiosa applicazione delle leggi di Newton.

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tratto da: "guardiamo a 370° enciclopedia astronomica"

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La variazione del moto angolare - Il momento angolare

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Uploaded by Treccani Scuola on 2017-01-26.

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La conservazione del momento angolare - Il momento angolare

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Uploaded by Treccani Scuola on 2016-11-12.

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Il momento di inerzia - Il momento angolare

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La definizione del momento angolare - Il momento angolare

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Uploaded by Treccani Scuola on 2016-11-12.