Two masses connected by a pulley with a frictionless table

AI Thread Summary
The discussion revolves around solving a physics problem involving two masses connected by a pulley on a frictionless table. The equations of motion for both masses are set up, leading to the acceleration formula a=(m2g)/(m1+m2). After substituting the given mass values, the tension in the system is calculated as T=25.8225N, and the acceleration is found to be a=4.2823 m/s². Participants confirm the calculations and suggest that a more straightforward approach could have been used. The solution appears to be correct based on the provided equations and values.
AHinkle
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Homework Statement


physics.jpg



Homework Equations


m1
\SigmaFy=N-m1g = 0
\SigmaFx=T=m1a
(Because there's no friction i see no opposing force to T)

m2
\SigmaFy=m2g-T=m2a
\SigmaFx=0


The Attempt at a Solution



m2g-T=m2a
T=m1a

(m1+m2)a=m2g-T+T
I notice that the T's cancel when i add the equations together
so it becomes

(m1+m2)a=m2g
so...
a=(m2g)/(m1+m2)

so...
T=m1a
T=(m1) (m2g)/(m1+m2)

m1=6.03kg
m2=4.68kg

T=(6.03Kg)((4.68Kg)(9.8)/(6.03Kg+4.68Kg))
so...
T=25.8225N

T=m1a
25.8225N = (6.03Kg)a

a=4.2823 m/s2
did i do this right?
 
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AHinkle said:
m2g-T=m2a
T=m1a

(m1+m2)a=m2g-T+T
I notice that the T's cancel when i add the equations together
so it becomes

(m1+m2)a=m2g
so...
a=(m2g)/(m1+m2)
You know, you could have just plugged the numbers in here and saved yourself some work. :smile:
a=4.2823 m/s2
'Looks right to me. :approve:
 
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