- #1

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How much mechanical energy dissipates in the collision?

I calculated the final velocity (-1.93 m/s) but I don not know where to go after that

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- Thread starter emeraldempres
- Start date

- #1

- 30

- 0

How much mechanical energy dissipates in the collision?

I calculated the final velocity (-1.93 m/s) but I don not know where to go after that

- #2

- 38

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Momentum is always conserved. That leaves just one thing that

- #3

Doc Al

Mentor

- 45,378

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Compare the initial total KE of both sandwiches to the final KE.

- #4

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the initial ke of a is

a: ke= .5(.5)(-3.5^2)= 3.0625

b: ke= .5 (.2)(2^2)= 1

and the final ke is ke= .5(.5+.2)(-1.93^2)= 1.304

I had all these and subtract them from eacj other and got -2.76

- #5

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- #6

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- #7

Doc Al

Mentor

- 45,378

- 1,757

Redo that second calculation.the initial ke of a is

a: ke= .5(.5)(-3.5^2)= 3.0625

b: ke= .5 (.2)(2^2)= 1

- #8

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thanks. i went back through my math and found an error, the answer is -2.16 J

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