5 A car 6 mass \(\mathbb { I } \quad\) g is p lig a trailer 6 mass \(\theta \quad\) g ah ll in lin d at an ag e \(6 \sin ^ { - 1 } ( \mathbb { I } )\) ) to th b izo al. Th car and to trailer are co cted b a lig rig d -b r wh ch is \(\boldsymbol { \rho }\) rallel to th ro d Th d iv g fo ce \(\varnothing\) th car's eg A is \(\theta \mathrm { N }\) ad th resistan es to th car ad trailer are \(\theta \mathrm { N }\) ad (1) N resp ctie ly.

1. Fid b acceleratio th sy tem ad b tensio it b tw -b r.
2. Wh it b car ad railer are tra llig tasp e \(\boldsymbol { \Theta } \quad \mathbf { b } \mathrm { ms } ^ { - 1 } , \mathrm { t } \mathbf { b }\) divg \(\mathbf { o }\) ce b cm es zero Fid th time, in sect , \(\mathbf { b }\) fo e the sy tem cm es to rest ad th fo ce in th ro \(\mathbf { r d }\) ig th s time.