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Bluesroo
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This is incredibly simple, but i cannot remember the formula for tension, which is a show stopper.
Simple pulley. Two masses attached with a string running over a frictionless wheel. m1 is 8kg and m2 is 12kg. I need to find acceleration and tension over the string.
F= ma
anet= (Fg2-Fg1)/(m1+m2)
T= Fnet1+Fg1 or T= Fnet2-Fg2 (I don't think these are right)
F= ma
Fg1= 8kg* 9.8m/sec^2
Fg1= 78.4N
Fg2= 12kg* 9.8m/sec^2
Fg2= 117.6N
anet= (Fg2-Fg1)/(m1+m2) (at second glance this seems like a faulty equation as well...)
anet= (117.6N-78.4N)/(8kg+12kg)
anet= 1.96m/sec^2
Now I can't find tension because I'm not sure where Fnet comes from (the sum of Fg1 and Fg2?) nor do I have the formula for tension written down... I didn't take very good notes on this (surprise surprise )
Homework Statement
Simple pulley. Two masses attached with a string running over a frictionless wheel. m1 is 8kg and m2 is 12kg. I need to find acceleration and tension over the string.
Homework Equations
F= ma
anet= (Fg2-Fg1)/(m1+m2)
T= Fnet1+Fg1 or T= Fnet2-Fg2 (I don't think these are right)
The Attempt at a Solution
F= ma
Fg1= 8kg* 9.8m/sec^2
Fg1= 78.4N
Fg2= 12kg* 9.8m/sec^2
Fg2= 117.6N
anet= (Fg2-Fg1)/(m1+m2) (at second glance this seems like a faulty equation as well...)
anet= (117.6N-78.4N)/(8kg+12kg)
anet= 1.96m/sec^2
Now I can't find tension because I'm not sure where Fnet comes from (the sum of Fg1 and Fg2?) nor do I have the formula for tension written down... I didn't take very good notes on this (surprise surprise )
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