85. Body mass m = 4 kg moves in straight lines so that the dependence of the distance traveled by the body s on time t is described by the equation s = A + Bt + Ct2 + Dt3, where C = 1 m / s2; D = -0,2 m / s3. Determine the force F, acting on the body at the end of the first second.
Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)
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