Conservation of momentum, change in velocity due to added mass from above

  • Thread starter bloodlust
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  • #1
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Homework Statement


A 15 kg cart is moving east at 3.0 m/s when 10 kg of newspaper is vertically dropped into the cart. Find final veocity?


2. Homework Equations [/b
m1v1i+m2v2i=m1v1f+m2v2f
Kinematic eqs and trig will be necessary to find components for the 10kgnewspaper



The Attempt at a Solution



Using the eqs isted above
 

Answers and Replies

  • #2
PeterO
Homework Helper
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Homework Statement


A 15 kg cart is moving east at 3.0 m/s when 10 kg of newspaper is vertically dropped into the cart. Find final veocity?


2. Homework Equations [/b
m1v1i+m2v2i=m1v1f+m2v2f
Kinematic eqs and trig will be necessary to find components for the 10kgnewspaper



The Attempt at a Solution



Using the eqs isted above


So what exactly is your question/difficulty. There is no evidence that you have been "Using the eqs isted above" ??
 
  • #3
2
0
I just dont know where to start. Do i just add the massafter the newspaper is added and find the velocity then?
 
  • #4
1,506
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Give it a try, momentum before (the cart) = momentum after (cart + newspaper) and see what you get.
Does it sound sensible
 

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