(adsbygoogle = window.adsbygoogle || []).push({}); Speed Problem (Please Help!!!)

* A system of blocks is released from the rest. the speed of 10kg block just before it hits the ground the ground. The surface is frictionless.

http://img80.imageshack.us/img80/6199/24722704da3.jpg [Broken]

Attempt:

I hv donw this way, but I am suppose to use work-kinetic enery theoreom or something to find the answer, which i hv no clue abt it.........thought u guys would help me

first i found acceleration: a = g(M -m1sin45 - m2sin45)/(M+m1+m2) = 4.31 m2/s2

then used vf2 = vi2 +2ax = 0 + 2(4.31)(5) = 42.23m2/s2

and vf = 6.5m/s

but i need get this answer by Work-Kinetic theorem or something............Please HElp

Thanks in advacne

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# Homework Help: Speed Problem (Please Help )

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