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Asked in JEE Main 4th April 1st Shift 2026 · Average and instantaneous power
⃗a=t̂i+3t²̂j; from rest ⃗v=(t²)/2̂i+t³̂j.
At t=2 s: ⃗F=4̂i+24̂j N, ⃗v=2̂i+8̂j m/s.
P=⃗F·⃗v=8+192=200 W.
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