A particle of mass m moving with a speed v hits elastically another stationary particle of ,ass 2 m in a fixed smooth horizontal circular tube of radius r. find the time when the next collision will take place?

Q. A particle of mass m moving with a speed v hits elastically another stationary particle of mass 2 m on a smooth horizontal circular tube of radius r. The time in which the next collision will take place is equal to

Q. A particle of mass $m$ moving with a speed $v$ hits elastically another stationary particle of mass $2m$ in a fixed smooth horizontal circular tube of radius $r$. Find the time when the next collision will take place?

Q. A particle of mass $m$ moving with a speed $v$ hits elastically another stationary particle of mass $2m$ on a smooth horizontal circular tube of radius $r$. The time in which the next collision will take place is equal to

Q. A particle of mass $m$ moving with a speed $v$ hits elastically another particle of mass $2m$ at rest, on a horizontal smooth circular tube of radius $R$.

Q. A ball of mass m moving with speed V collides with another ball of mass 2m $(e=\frac{1}{2})$ in a horizontal smooth fixed circular tube of radius R (R is sufficiently large $R>>>d$). The time after which next collision will take place is