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The position vector of a particle is given by r = 13ti + 2.3t^2j-0.4(t^3 - 8)k, where t is the time in seconds from the start of the motion
and where r is expressed in meters. For the condition when t = 7 s, determine the power P developed by the force F = 26i - 43j - 35k N
which acts on the particle.
Answer: P = i kW
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