A 2D (two-dimensional) barcode is a graphical image that stores information both horizontally -- as one-dimensional <term>bar code</term>s do -- and vertically. As a result of that construction, 2D...
Centripetal force is the inward-seeking pull of an object. Centrifugal force is the opposite; it appears to pull objects away from the center or axis of rotation.
An upward force is any force that counteracts the force of gravity. Buoyancy is an example of an upward force because it pushes an object away from the Earth's center of... An upward force is any force that counteracts the force of gravity. Buoyancy is an example of an upward force because it pushes an object away from the Earth's center of mass. Keep Learning.