Two perfectly elastic objects and of identical mass are moving with velocities 15 m/s and 10 m/s respectively, collide along the direction of line ioiningthem. Their velocities after collision are respectively

IN  a perfectly elastic collision if the colliding bodies or particles have equal masses then after collision they will exchange their velocities. Let m be the identical mass of two objects ,1 and B we have 15m+10m=mv1+mv2 25=v1+v2 In elastic collision, v2−v1u1−u2=1  or  v2−v115−10=1 ∴ v2−v1=5 Solving eqs. (1) and [2), we 8et V2=15m/s  and  v1=10m/s