Mechanics – Dynamics Systems Accessories
Magnetic Damping Accessory
PAScar/GOcar Accessories
ME-6828 The spring-and-car oscillation experiment shown here uses a Motion Sensor to measure the position and velocity of the cart. The Magnetic Damping Accessory induces eddy currents in the aluminum track, causing friction which is proportional to the velocity of the cart. Students can vary all of the parameters, including the amount of damping, track angle, cart mass, and spring constant.
ME-6952
Motion Sensor measures position and velocity of cart.
Extend the utility of the PAScar and GOcar. Each set includes: Friction Pad Magnetic Bumper Magnetic Damping The steel bracket of the Magnetic Damping Accessory slides up and down to adjust the amount of damping.
Over-damped, Under-damped, Critically-damped
The cart is displaced from equilibrium and then released from rest. The green line shows a system that is under-damped, with the magnets far from the track. The cart is over-damped (blue line) when the magnets are very close to the track, and it takes over four seconds for the cart to reach its equilibrium position. When the cart is critically damped (red line) it reaches its equilibrium position in the minimum amount of time, which for this system is just over two seconds. Order Information:
Includes: Bracket Magnets Keeper
Magnetic Damping Accessory. ...................................ME-6828 Equipment shown: PAScar Dynamics System (1.2 m).........................ME-6955 Dynamics Track Spring Set. .............................................ME-8999 Motion Sensor.................................................................................PS-2103A
Cart Damping Accessory ME-9497
The aluminum Cart Damping Accessory fits in the slot in the Dynamics Cart mass tray. The magnetic bracket that mounts in the T-slot of the Dynamics Track causes magnetic damping as the aluminum passes through the magnetic field. The gap between the 1.9 cm neodymium magnets can be varied to change the strength of the magnetic field.
The Magnetic Bumper attaches to the Velcro end of the PAScar for a chain of elastic collisions. The bumper can also be attached to the GOcar so it can undergo elastic collisions with a PAScar.
Adjustment Screw
Compatible with PASCO Classic Carts, PAScars and GOcars.
The Cart accelerates as the aluminum passes through the magnetic field. Order Information: Cart Damping Accessory...............ME-9497 Required: PAScar or Dynamics Cart. p. 108-109 PASCO Dynamics Track p. 110-111
The Friction Pad is installed through a threaded hole in the middle of the cart. Students can rotate the pad to either increase or decrease the induced friction. Order Information: PAScar/GOcar Accessories.....................................................ME-6952
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