Can you Define therminal velocity?

Question

when does an object reach therminal velocity?

Answer 1

I think you have got it wrong. Its mis spelled by you.Its Terminal Velocity.
The terminal velocity of an object falling towards the ground, in non-vacuum, is the speed at which the gravitational force pulling it downwards is equal and opposite to the atmospheric drag (also called air resistance) pushing it upwards. At this speed, the object ceases to accelerate downwards and falls at constant speed. An object moving downwards without power at greater than the terminal velocity (for example because it previously used power to descend, it fell from a thinner part of the atmosphere or it changed shape) will slow down until it reaches terminal velocity.

For example, the terminal velocity of a skydiver in a normal free-fall position with a closed parachute is about 195 km/h (120 Mph). It would take about 5.5 seconds to reach that speed. This speed increases to about 320 km/h (200 Mph) if the skydiver pulls in his limbs—see also freeflying. This is also the terminal velocity of the Peregrine Falcon diving down on its prey.

The reason an object reaches a terminal velocity is because the drag force resisting motion is directly proportional to the square of its speed. At low speeds the drag is much less than the gravitational force and so the object accelerates. As it speeds up the drag increases, until eventually it equals the weight. Drag also depends on the cross-sectional area. This is why things with a large surface area such as parachutes and feathers have a lower terminal velocity than small objects like bricks and cannon balls.

Mathematically, terminal velocity is described by the equation

V_t= \sqrt{\frac{2mg}{\rho A C_d }}

where

Vt is the terminal velocity,
m is the mass of the falling object,
g is gravitational acceleration,
Cd is the drag coefficient,
ρ is the density of the fluid the object is falling through, and
A is the object's cross-sectional area.

This equation is derived from the drag equation by setting drag equal to mg, the gravitational force on the object.

Note that the density increases with decreasing altitude, ca. 1% per 80 m (see barometric formula). Therefore, for every 160 m of falling, the "terminal" velocity decreases 1%. After reaching the local terminal velocity, while continuing the fall, speed decreases to change with the local terminal velocity

Answer 2

It's terminal Velocity
The terminal velocity of an object falling towards the ground, in non-vacuum, is the speed at which the gravitational force pulling it downwards is equal and opposite to the atmospheric drag (also called air resistance) pushing it upwards. At this speed, the object ceases to accelerate downwards and falls at constant speed. An object moving downwards without power at greater than the terminal velocity (for example because it previously used power to descend, it fell from a thinner part of the atmosphere or it changed shape) will slow down until it reaches terminal velocity.

Answer 3

The terminal velocity of an object falling towards the ground, in non-vacuum, is the speed at which the gravitational force pulling it downwards is equal and opposite to the atmospheric drag (also called air resistance) pushing it upwards. At this speed, the object ceases to accelerate downwards and falls at constant speed. An object moving downwards without power at greater than the terminal velocity (for example because it previously used power to descend, it fell from a thinner part of the atmosphere or it changed shape) will slow down until it reaches terminal velocity.

For example, the terminal velocity of a skydiver in a normal free-fall position with a closed parachute is about 195 km/h (120 Mph). It would take about 5.5 seconds to reach that speed. This speed increases to about 320 km/h (200 Mph) if the skydiver pulls in his limbs—see also freeflying. This is also the terminal velocity of the Peregrine Falcon diving down on its prey.

Answer 4

When a bus reaches its destination it is at a bus terminal (end of the trip). Terminal velocity could as easily be called "end" velocity because a falling object can not go faster than wind resistance will permit. A parachute greatly reduces terminal velocity (so that the plunge will end well!). Sky divers can alter their terminal velocities by "flying" horizontal to the ground or by pointing their bodies straight down (to catch up with a buddy with a half-deployed parachute?).

Answer 5

A falling object will increase in speed, accelerate, due to the force of gravity. When the resistance from the air is such that the speed no longer increases but remains constant then the body has reached terminal velocity.

Answer 6

well its terminal velocity, and it is when an object is falling an is unable to gain anymore speed. the force of gravity pulling on the object is equal to the objects weight. but the surface area affects this because the bigger the surface area the longer it takes for the object to reach its terminal velocity also the weight affects it the heavier the object is the bigger the terminal velocity the longer it takes for the object to reach its terminal veolcity. sumfin lyk dat lol

Answer 7

Do you mean terminal velocity? This is the velocity of an object falling under gravity when it reaches the stage where it is no longer accelerating.

Answer 8

therminal velocity - when an object has reached its terminal velocity and then spontaneously ignites due to friction



probably not ...but if you are going to be an engineer you need to be REALLY accurate and precise...even with your spelling!

Answer 9

you mean TERMINAL velocity.
during free fall, a body's acceleration dercreases due to air resistance and eventually reaches zero where the velocity remains constant.
this occurs because the air resistance becomes equal to the body's weight hence the resultant force is zero. since F=ma, when F=0, a =0, therefore no acceleration, and velocity stops changing.

Answer 10

terminal velocity is the speed reached of an object in which there is an equal force ( usually due to air resistance) equalling the pull of gravity.