If the body is thrown downwards, so that its initial speed is not zero but is v=v0 when t=0, you will write the equation of motion either as Equation ??? or as Equation \...If the body is thrown downwards, so that its initial speed is not zero but is v=v0 when t=0, you will write the equation of motion either as Equation ??? or as Equation ???, depending on whether the initial speed is slower than or faster than the terminal speed, thus ensuring that the denominator is kept firmly positive.
A moving object in a viscous fluid is equivalent to a stationary object in a flowing fluid stream. (For example, when you ride a bicycle at 10 m/s in still air, you feel the air in your face exactly a...A moving object in a viscous fluid is equivalent to a stationary object in a flowing fluid stream. (For example, when you ride a bicycle at 10 m/s in still air, you feel the air in your face exactly as if you were stationary in a 10-m/s wind.) Flow of the stationary fluid around a moving object may be laminar, turbulent, or a combination of the two. Just as with flow in tubes, it is possible to predict when a moving object creates turbulence.
