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.

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Is there a difference in energy required to make 2 items with the same exact mass but different material travel the same distance whilst in free fall?

is there a difference in energy required to make 2 items with the same exact mass but different material travel the same distance whilst in free fall? Please answer for all cases of free fall: ...
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Damped harmonic motion [closed]

A metal pendulum on a 1 m string swings on Earth (g=9.81m/s^2) in an environment with negligible friction from air. The same metal ball pendulum is now placed in a container containing a mysterious ...
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Is the conclusion to this problem about terminal velocity correct?

So I've been solving problems for my upcoming classical mechanics exam. One of them had to do about terminal velocity. It presents two spheres of identical mass $m$ but where $2r_1=r_2$. Air ...
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Velocity of projectile with both quadratic and constant resistive force

Suppose we have a projectile of mass $m$ that impacts a material with velocity $v_0$. As it travels through the material it is subject to the resistive force $F = \alpha v^2 + \beta$. How can I ...
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Fall with drag - ignoring the gravitational force?

Say we have a fall while considering air resistance $$ma=mg-Bv^2.$$ It is a standard differential equation. But then I was asked what would happen, if we ignore the gravitational force $mg$. Now I am ...
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Falling Box Question

Let's say that I drop a 2D box which weighs mass m (lets say 10kg), in an infinitely large 2D space (+ time) which has gravity g (lets say 9.8), constantly pushing the box downwards, the space has ...
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Why don't bullets used in guns have sharp corner edges? [closed]

Why don't bullets used in guns have sharp corner edges? Like why are they spherical or smooth at the tip? Is it to avoid air resistance? But as my sir told that how speed we move proportional we get ...
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Which equation is more suitable when a man lifts his leg in fluid (such as snow, sand or mud), Drag equation or Stokes's law, or other equation? [closed]

When a person lifts his leg in fluid (such as snow, sand or mud), what kind of resistance/viscous force will his leg encounter in the vertical direction, which equation is more suitable? Drag equation ...