An air cushion is a layer of trapped air which supports a
hovercraft.
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An air-cushion vehicle is an alternative name for a
hovercraft.
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Air cushion vehicles work by creating a large force of that
points to the ground. This lifts the vehicle off the ground letting
it ride on a cushion of air.
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it rides on an air cushion so it can go on water, land, snow ect.
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A vehicle that travels over water or land on a cushion of air is called a hovercraft