在碰撞后，假设m2以u2返回，假如m1的速度为u1。

After the collision let's say m2 goes back with velocity u2 prime, and let's say m1 has a velocity u1 prime.

youdao

在碰撞后，假设m2以u2返回，假如m1的速度为u1。

After the collision let's say m2 goes back with velocity u2 prime, and let's say m1 has a velocity u1 prime.

youdao