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How to calculate tensionby mIsix
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#1
Mar3009, 10:15 PM

P: 5

hi i am in grade 11 university physics, and i have a test coming up that requires me to calculate tension. Unfortunately i have no clue how to do this. Can someone help ?



#2
Mar3009, 10:23 PM

HW Helper
P: 6,202

well it depends on the question you are given. But I'd say (at a random guess) that you need to resolve all the forces in one direction and put that equal to ma, then try to solve from there.



#3
Mar3009, 10:30 PM

P: 5

ok well my question states that, two toy ducks are attached by a string. the front duck has a mass of 5 kg, and the back duck is 2.0 kg. they are bing pulled wiith a force of 10N and there is no friction.
calculate the tension of the rope after u have calculated the acceleration. the acceleration of the ducks is 1.4m/s2 and i drew an FBD like soo (2.0kg)DUCk2(5.0kg)DUCK1>10N i still dont kno where to go from here? 


#4
Mar3109, 08:41 AM

P: 462

How to calculate tension
Homework .. ehh
First u have to calculate the accelaration of the system: F=m(total)*a => a=F/m(total) m(total)=m1+m2=7 kg the Tension is equal to the inertial force that the second weight (2kg) exerts. so: T(ension)=F=a*m2 aacceleration m2second duck 2 kg 


#5
Mar3109, 06:33 PM

P: 5

thanks a lot, that helped me tremendously. :)
i get it now, but there is another part where it says that another duck(1 kg) is added, and it is put at the front of the row. DUCK2(2kg)DUCK1(5kg)DUCK3(1kg)>(10N) Now it asks for the tension connecting ducks 2(2kg) and 3(1kg)and then the tension of ducks 1(5kg) and ducks 2(2kg) . would the tension still be equal to the inertial force of the last duck(2kg)? or would it now be equal to the inertial force of the middle duck(5kg)? 


#6
Mar3109, 07:11 PM

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P: 5,341




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