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 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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The lab 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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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.
LAB
This is a lab 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 lab has 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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This lab allows you to observe the rotation of a revolving door about its center. How would you move the revolving door? Where would you apply the force? You can change the position and the size of the force, and the mass and length of the panel of the door.
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In this lab, you can compare the motion of a ball, which is influenced by gravity alone, to that of a disk, which has a constant angular acceleration directed counter-clockwise.
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This simulation shows the four inner planets of the solar system, as they orbit the Sun. Moving out from the Sun, we see Mercury, Venus, Earth, and Mars, in that order.
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