- #1
deNsity
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Here is the problem I am given,
Two blocks are connected by a string that passes over a massless, frictionless pulley. Block A, with a mass of 2.0 kg, rests on a ramp measuring 3.0m vertically and 4.0m horizontally. Block B hangs vertically below the pulley. Use g = 10 m/s^2 for simplicity.
When the system is released from rest, block A accelerates up the slove and block B accelerates straight down. When block B has fallen through a height h=2.0m, its speed is v=6.0m/s
Using Wnc = (KE + PE) - (KEo + PEo)
I am asked first to identify which term is equal to zero.
Since there is a non conservative force (tension), Wnc does not equal 0
However, the system begins from rest, so KEo = 0
I am then asked to solve for the mass of Block B using the equation above.
with KEo = 0, I know that,
Wnc = KE + PE - PEo, However, I am unsure of how to solve for m since it appears in
all the terms. How can I isolate it?
Am I simply overthinking the problem?
Thanks!
-density
Two blocks are connected by a string that passes over a massless, frictionless pulley. Block A, with a mass of 2.0 kg, rests on a ramp measuring 3.0m vertically and 4.0m horizontally. Block B hangs vertically below the pulley. Use g = 10 m/s^2 for simplicity.
When the system is released from rest, block A accelerates up the slove and block B accelerates straight down. When block B has fallen through a height h=2.0m, its speed is v=6.0m/s
Using Wnc = (KE + PE) - (KEo + PEo)
I am asked first to identify which term is equal to zero.
Since there is a non conservative force (tension), Wnc does not equal 0
However, the system begins from rest, so KEo = 0
I am then asked to solve for the mass of Block B using the equation above.
with KEo = 0, I know that,
Wnc = KE + PE - PEo, However, I am unsure of how to solve for m since it appears in
all the terms. How can I isolate it?
Am I simply overthinking the problem?
Thanks!
-density