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Physics · WORK, ENERGY AND POWER
हिन्दीFor a particle of mass \( m \) moving in one dimension under a variable net force \( F \), the time rate of change of kinetic energy \( \frac{dK}{dt} \) is mathematically expressed as:
Correct answer · Option 2
\( F v \)
Explanation
\( \frac{dK}{dt} = \frac{d}{dt}(\frac{1}{2}mv^2) = m v \frac{dv}{dt} = F v \), using Newton's second law \( F = m\frac{dv}{dt} \).
