Ask an Explainer
Q:
What causes an object in air to slow down? For example, a tennis ball that is projected from a catapult. What slows it down?
A:
Drag is the force of flight that slows down objects, like tennis balls and planes, in the air. Drag can be caused by differences in air pressure and friction on the object’s surface. Drag is one of the four forces of flight. You can build your own plane to see how to reduce drag.
Posted on November 12, 2012 at 7:21 pm
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