# what was Prancer's velocity before the collision

*label*Economics

*timer*Asked: Feb 21st, 2015

**Question description**

Dancer, who has a mass of 5 kg, ran at 1 m/s directly at Prancer who has a mass of 5 kg. If both reindeer come to a stop after the collision, what was Prancer's velocity before the collision? In general, how do I solve this type of questions? Please explain and give me at least 5 more related sample questions with explanations.