Two identical balls $A$ and $B$ having initial velocities of $1.2 \mathrm{~m/s}$ and $-0.8 \mathrm{~

Question

Two identical balls $A$ and $B$ having initial velocities of $1.2 \mathrm{~m/s}$ and $-0.8 \mathrm{~m/s}$ respectively, collide elastically in one dimension. The velocities of $A$ and $B$ after the collision will respectively be

Professor PC Thomas Classes · Answer

(b) : In a perfectly elastic one-dimensional collision between two bodies of identical masses, the bodies simply exchange their velocities upon impact. Since initial velocities were $v_A = 1.2 \mathrm{~m/s}$ and $v_B = -0.8 \mathrm{~m/s}$, after the collision, their velocities will be $v_A' = -0.8 \mathrm{~m/s}$ and $v_B' = 1.2 \mathrm{~m/s}$.