Questions tagged [drag]

The force on a body resulting from it's motion through a fluid (gas or liquid). This force is directly opposed to the direction of travel.

684 questions
Filter by
Sorted by
Tagged with
12 views

Finding acceleration from drag force/initial velocity in terms of terminal velocity

A ball is thrown horizontally with an initial velocity of half of its terminal velocity. What was its initial acceleration? I understand that being thrown at half terminal velocity means a drag ...
34 views

When a skyscraper sways in the wind, in which direction is the motion?

Skyscrapers sway in the wind (Source here). Which direction, relative to the wind, do they sway, ignoring effects of other buildings nearby? I can imagine wind from the North blowing a skyscraper's ...
23 views

What is the drag coefficient of a tetrahedron? [on hold]

I would like to know the drag coefficients of all of the Platonic Solids. However, I am more interested in that of the tetrahedron.
105 views

What would happen if you drop two objects of the same shape and size but different mass in Earth's atmosphere?

The question of letting two objects fall in vacuum and the effects on gravity is discussed on this site including questions like the gravitational pull of the objects towards each other, the Earth's ...
131 views

Physics of air flow in Kipchoge's sub-2:00 marathon

Yesterday Eliud Kipchoge became the first human to run a marathon distance in under two hours. Part of what allowed him to do it seems to have been that he had pacers running along with him to break ...
44 views

About stoke 's formula

Why does the acceleration decrease whereas velocity increase for a freely falling spherical body inside a viscous liquid
53 views

Why is the body of the rocket so long and does it effect the flight?

so my qustion is that why are rockets body so fricken long it is crazy all the rockets body are so very long and I need an answer to the question please tell me it is for science and i really need ...
139 views

Numerical method for first-order non-linear differential equation

So I'm modeling a cycler on a 1000 m race track using the equation $$\frac{dv}{dt}=\frac{P}{m}\left(\frac{1}{v}\right)-\frac{k}{m}\left(v^2\right)-ug$$ where $P$ = power, $m$ = mass, $v$ = velocity of ...
52 views

How does this toilet lid work?

After further reflection after closing the lid on my toilet, I noticed it exhibited a behaviour that I can't explain. When you let the lid fall, it falls at a constant speed regardless of its angle. ...
14 views

Drag coefficient for the fin of a model rocket

I am working on a 1D model rocketry simulator that accounts for drag. I have been looking online, but unable to find the typical drag coefficient for a fin. Would anybody happen to know what it is?
13 views

How would one represent/model the effect of air resistance on horizontal motion? [duplicate]

Evidently, there are formulas that allow us to represent the effect of air resistance on the velocity of an object in free fall but how would one calculate the effect of air resistance on horizontal ...
In my school experiment, I wanted to measure the gravitational constant ($9.81 \ m/s^2$) by using a pendulum. If we take into account the damped oscillation (i.e. friction forces), does that affect ...