![]() ![]() In general, for the same shape and material, the terminal velocity of an object increases with size. An object with a large projected area relative to its mass, such as a parachute, has a lower terminal velocity than one with a small projected area relative to its mass, such as a dart. Drag depends on the projected area, here represented by the object's cross-section or silhouette in a horizontal plane. ![]() An object moving downward faster than the terminal velocity (for example because it was thrown downwards, it fell from a thinner part of the atmosphere, or it changed shape) will slow down until it reaches the terminal velocity. At this point the object stops accelerating and continues falling at a constant speed called the terminal velocity (also called settling velocity). At some speed, the drag or force of resistance will equal the gravitational pull on the object. Īs the speed of an object increases, so does the drag force acting on it, which also depends on the substance it is passing through (for example air or water). In fluid dynamics an object is moving at its terminal velocity if its speed is constant due to the restraining force exerted by the fluid through which it is moving. For objects falling through regular air, the buoyant force is usually dismissed and not taken into account as its effects are negligible Since the net force on the object is zero, the object has zero acceleration. It occurs when the sum of the drag force ( F d) and the buoyancy is equal to the downward force of gravity ( F G) acting on the object. Terminal velocity is the maximum velocity (speed) attainable by an object as it falls through a fluid ( air is the most common example). The net force on the object is zero, and the result is that the velocity of the object remains constant. The downward force of gravity ( F g) equals the restraining force of drag ( F d) plus the buoyancy. JSTOR ( March 2012) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed.įind sources: "Terminal velocity" – news Please help improve this article by adding citations to reliable sources in this article. This article needs additional citations for verification.
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