A 120g ball moving to the right at 4.0m/s catches up and collides with a 420g ba

Question

A 120g ball moving to the right at 4.0m/s catches up and collides with a 420g ball that is moving to the right at 1.2m/s . a. If the collision is perfectly elastic, what is the speed of the 120 ball after the collision? b. If the collision is perfectly elastic, what is the direction of motion of the 120 ball after the collision? C. If the collision is perfectly elastic, what is the speed of the 420 ball after the collision? d. If the collision is perfectly elastic, what is the direction of motion of the 420 ball after the collision?

Explanation / Answer

You will need two equations to solve this problem which I know you are aware of: m1*v1i + m2*v2i = m1*v1f + m2*v2f [conservation of momentum] the other is kinetic energy but to make it easy on you.. the equation will reduce down to: v1i - v2i = v2f - v1f Simultaneously solve those two equations for v1f and v2f and you if you get a negative then you know it's to the left. I would tell you answers but I believe you can solve it from there

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.