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

AI Thread Summary
The discussion centers on a physics problem involving a 15 kg cart moving east at 3.0 m/s when 10 kg of newspaper is dropped into it. Participants emphasize using the conservation of momentum equation, m1v1i + m2v2i = m1v1f + m2v2f, to find the final velocity after the mass is added. There is confusion about how to apply the equations correctly, particularly regarding the initial and final velocities. One participant suggests calculating the momentum before and after the newspaper is added to determine the final velocity. The conversation highlights the importance of understanding momentum conservation in such scenarios.
bloodlust
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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
 
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bloodlust said:

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" ??
 
I just don't know where to start. Do i just add the massafter the newspaper is added and find the velocity then?
 
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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