Two cars of masses $\mathrm{m}_1$ and $\mathrm{m}_2$, joined back to back by a massless compressed spring…
Two cars of masses $\mathrm{m}_1$ and $\mathrm{m}_2$, joined back to back by a massless compressed spring are at rest on a horizontal rough road. When the compression of the spring is suddenly removed, the cars move away from each other and come to rest due to friction. If the frictional force is same on them, their stopping times are in the ratio