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Can someone help me with this physics problem? A block of ice
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Anonymous
2016-03-22 15:21:39 Post No. 84698
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Anonymous 2016-03-22 15:21:39 Post No. 84698 [Report]
Can someone help me with this physics problem?

A block of ice of mass m and a wedge of ice of mass M can slide on one another and on a horizontal surface without friction. Initially the wedge is at rest andd the block moves towards it with speed v0. When the block reaches the wedge it slides up the slope to a maximum height, h above the horizontal. It then descends and returns to the horizontal surface.
a) What is the height, h, reached by the block?
b) What are the final velocities of the block and wedge after they are no longer in contact?

I'm terrible at physics, so I'm not sure if this is an elastic or inelastic collision. I think it's inelastic? I also think I have to use KE and PE somewhere but I just don't know how to connect all these formulas to get an answer.
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Anonymous 2016-03-22 15:27:41 Post No.84700
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Anonymous 2016-03-22 15:27:41 Post No.84700 [Report]
>>84698
>so I'm not sure if this is an elastic or inelastic collision
inelastic.

is there friction on the surface of the wedge?
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Anonymous 2016-03-22 15:30:52 Post No.84701
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Anonymous 2016-03-22 15:30:52 Post No.84701 [Report]
>>84700
I think the problem says there's no friction, right?
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Anonymous 2016-03-22 15:44:47 Post No.84710
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Anonymous 2016-03-22 15:44:47 Post No.84710 [Report]
>>84701
it says theres no friction on the horizontal surface. if the wedge is frictionless there is nothin stopping the block from just ramping off it.
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Anonymous 2016-03-22 15:54:13 Post No.84719
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Anonymous 2016-03-22 15:54:13 Post No.84719 [Report]
>>84710
Yea, idk, I just copied the problem exactly as it is written.
So far, I got that mv0=(m+M)vf
so vf=mv0/(m+M)

Then I got to plug this into a conservation of energy equation to solve for h, is that right?
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