Regarding another momentum problem

  • Thread starter Zuloft
  • Start date
  • #1
5
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a 4kg object travelling west a 25 m/s hots a 15 kg object at rest. the 4 kg object bounces eastward at 8 m/s. what is the speed and direction of the 15 kg object.

i set it up at

(m1)(v1)+(m2)(v2)= (mtotal)(vfinal)
100/ 19 = x
5.26 = x

except i solvedfor the final v
IM STUMPED anything on what i did wrong?:yuck:
 

Answers and Replies

  • #2
G01
Homework Helper
Gold Member
2,665
16
your problem here is your formula. You are using a formula where the two objects stick together after the collision. (Inelastic) instead of one where they bounce off.(elastic)
 
Last edited:

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