You have a puley on which a light string passes. At one end ofthe string a mass of 5 Kg is attached and on the other end another pulley of mass 1 Kg is attached. A second light string passes over this second pulley. At the extremities of this string two masses of 2 and 1 Kg are attached. Calculate the accelerations of the masses and the tension in the two strings.(adsbygoogle = window.adsbygoogle || []).push({});

I attempted this problem, solving a system of 4 equations:

pulley: 1(9.8)-(T1-T2)= a

5Kg mass: 5(9.8)-T1=-5a

1Kg mass: 1(9.8)-T2=-(f-a)

2Kg mass: 2(9.8)-T2=(f+a) where a=acceleration of 5 Kg mass

F=acceleration of the 1 and 2 Kg masses relative to the second pulley

T1= tension in the first string

T2 Tension in the second string

Where is my mistake?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: A system of pulleys

**Physics Forums | Science Articles, Homework Help, Discussion**