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Inelastic Collisions 
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#1
Oct1809, 08:07 PM

P: 16

1. The problem statement, all variables and given/known data
In the figure below, block 2 (mass 1.4 kg) is at rest on a frictionless surface and touching the end of an unstretched spring of spring constant 170 N/m. The other end of the spring is fixed to a wall. Block 1 (mass 2.0 kg), traveling at speed v1 = 4.0 m/s, collides with block 2, and the two blocks stick together. When the blocks momentarily stop, by what distance is the spring 2. Relevant equations m1v1=m2v2 3. The attempt at a solution I attempted the solution but I am confused about the 170N/m How would I use that information and relate it to the equations of inelastic collision? 


#2
Oct1809, 08:21 PM

HW Helper
P: 4,435

Find the velocity of the combined blocks after collision. Then find the KE of the the combined blocks.
What is the expression for the energy stored in a compressed spring? 


#3
Oct1809, 08:47 PM

P: 16

ohhh okk i got it
I had to use W=1/2kx^2 they gave k and i figured out W through the KE equation. it was 0.33 m if you were curious. 


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