Practice portal › Motion in a Straight Line › Motion with Variable Acceleration
Asked in JEE Main 31st Jan 1st Shift 2024 · Velocity- and position-dependent acceleration
Differentiate t = α x² + β x with respect to x: (dt)/(dx) = 2α x + β, so v = (dx)/(dt) = 1/(2α x + β).
(dv)/(dx) = -(2α)/((2α x + β)²) = -2α v².
Chain rule: a = (dv)/(dt) = v(dv)/(dx) = v(-2α v²) = -2α v³.
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