Motion with Drag | Terminal Velocity (Step by Step)
For the Love of Physics
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Motion with Drag | Terminal Velocity (Step by Step)
7 803 просмотра · 5 лет назад
For the Love of Physics
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7 803 просмотра · 5 лет назад
In ideal case, a falling object is supposed to accelerate at a constant rate of 9.8 m/s^2. However, in real life situations, the velocity of falling objects reach an upper limit known as Terminal speed or Terminal velocity. This is because, there is an external medium like air or other fluids that introduce a Drag Force that counteracts the gravitational attraction. Terminal velocity is reached when the Drag force becomes equal to the weight of the body.
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In this video, I solve the Force equation to obtain an expression of how velocity of falling object varies with time for two cases -
(i) Drag Force is directly proportional to velocity
(ii) Drag Force is directly proportional to velocity squared
00:00 Introduction
03:15 Drag Force proportional to v
11:24 Drag Force proportional to v-squared
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