Question:

# What is the maximum speed can an object fall?

## The maximum speed at which an object will fall is called “terminal velocity." Theoretically, there is no limit. AnswerParty on!

Physics Measurement

A physical quantity (or "physical magnitude") is a physical property of a phenomenon, body, or substance, that can be quantified by measurement.

Terminal velocity is simply the fastest speed that a falling object can reach in a certain circumstance. Different objects have different terminal velocities.

The terminal velocity of a falling object is the velocity of the object when the sum of the drag force (Fd) and buoyancy equals the downward force of gravity (FG) acting on the object. Since the net force on the object is zero, the object has zero acceleration.

Velocity Speed

Apparent wind is the wind experienced by a moving object.

The coefficient of restitution (COR) of two colliding objects is a positive real number between 0.0 and 1.0 representing the ratio of speeds after and before an impact, taken along the line of the impact. Pairs of objects with COR = 1 collide elastically, while objects with COR < 1 collide inelastically. For a COR = 0, the objects effectively "stop" at the collision, not bouncing at all. An object (singular) is often described as having a coefficient of restitution as if it were an intrinsic property without reference to a second object, in this case the definition is assumed to be with respect to collisions with a perfectly rigid and elastic object. The Coefficient of Restitution is equal to the Relative Speed After Collision divided by the Relative Speed Before Collision.

$\text{Coefficient of Restitution } (C_R) = \frac{\text{Relative Speed After Collision}}{\text{Relative Speed Before Collision}}$

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