Find −→F2 at that instant.
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: A particle of mass m has the following position vector as a function of time t r(t) = At3ˆi + Bt2ˆj + Ctˆk where A, B, and C are constants. At t = τ , two external forces −→F1 =αˆi+βˆj+γ ˆk and −→F2 act on the particle where α, β, and γ are constants. Find −→F2 at that instant.
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