http://www.imagebam.com/image/9f4869393014019

1. There is no actually data given, Im just supposed to explain why a string that crosses a pulley have the same tension both sides. The pulleys moment of inertia is zero and friction is negligible.
There is a little hint in this problem that says; study equation 9-15, which is:"Στ=lα"

Question

http://www.imagebam.com/image/9f4869393014019

1. There is no actually data given, Im just supposed to explain why a string that crosses a pulley have the same tension both sides. The pulleys moment of inertia is zero and friction is negligible. 
There is a little hint in this problem that says; study equation 9-15, which is:"Στ=lα"

perl · Answer

do you have a physics book i can look at

perl · Answer

or an online physics book

anonymous · Answer

hmm No not an online, but im using coletta

anonymous · Answer

physics fundamentals by vincent p. coletta

perl · Answer

thanks, i will search online

anonymous · Answer

why you need it?