Load on Removable Incline (1J30.10)
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A cart rests against a support block on an incline. A force can be applied parallel to the incline by a weight strung over a pulley, which is equal to the component of gravitational force in that direction. The support block can now be removed. Another weight is used to balance the normal force perpendicular to the incline; the incline can now also be removed. The cart will remain suspended in air.