Acceleration from Velocity-Position Relation – Rankers Physics
Topic: Kinematics
Subtopic: Calculus Based Questions

Acceleration from Velocity-Position Relation

A particle of unit mass undergoes one dimensional motion such that its velocity varies according to \(v(x) = \beta x^{-2n}\) where \(\beta\) and (n) are constants and (x) is the position of the particle. The acceleration of the particle as a function of (x), is given by:

(2015)

\(-2n\beta^2 x^{-4n-1}\)
\(-2n\beta^2 x^{-2n+1}\)
\(-2n\beta^2 e^{-4n+1}\)
\(-2n\beta^2 x^{-2n-1}\)

Solution:

Given \(v = \beta x^{-2n}\). Acceleration \(a = v \frac{dv}{dx}\). First find \(\frac{dv}{dx} = \beta (-2n)x^{-2n-1}\). Then \(a = (\beta x^{-2n})(-2n\beta x^{-2n-1}\) = \(-2n\beta^2 x^{-4n-1}\).

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