The power applied to a particle $ P=\left[3 t^{2}-2 t+1\right] \mathrm{W} $, where $ t $ is in seconds. Find the change in kinetic energy of particle from $ t=2 \mathrm{~s} $ to $ 4 \mathrm{~s} $.

Question

The power applied to a particle $ P=\left[3 t^{2}-2 t+1\right] \mathrm{W} $, where $ t $ is in seconds. Find the change in kinetic energy of particle from $ t=2 \mathrm{~s} $ to $ 4 \mathrm{~s} $., $ 46 \mathrm{~J} $, $ 52 \mathrm{~J} $, $ 92 \mathrm{~J} $, $ 104 \mathrm{~J} $

MARKS App · Accepted Answer

Δ K = ∫ 2 4 P d t = t 3 – t 2 + t 2 4 = 46 J

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