88. A particle of mass m moving under the force F = F0cos (ωt), where F0 and ω - are constants. Determine the position of the particle, ie, express its radius vector r as a function of time, if at the initial time t = 0, r (0) = 0 and υ (0) = 0.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)