Two blocks connected by a string are pulled across a horizontal frictionless surface by a horizontal force of magnitude F=14.0 N. What is the tension (T) in the connecting string?
so you have block 1 (mass of 2kg) then the string then block 2 (mass of 5kg) then the force pulling it of 14 N
The Attempt at a Solution
so i found the acceleration:
a = f/m
a = 14/(5+2) = 2 m/s2
then i found the tension:
t = ma
t = 2kg(2m/s2)
t = 4 N
What i am wondering is why do you multiply the 2kg block by the acceleration to get the tension and not multiply the 5kg block or the total of 7kg by the acceleration to get the tension?
can anyone explain please? i have a physics exam tomorrow and i am studying and really trying to understand tension :)