- #1
iamtrojan3
- 56
- 0
Homework Statement
Four blocks are on a horizontal surface. The blocks are connected by thin strings with tensions Tx, Ty, Tz. The masses of the blocks are A=22.0 kg, B=21.0 kg, C=17.0 kg, D=27.0 kg. Two forces, F1=83.0N and F2=50.0N act on the masses as shown. Assume that the friction between the masses and the surface is negligible and calculate the tension Tx.
See attached Pic.
Homework Equations
F = ma
The Attempt at a Solution
First, I calculated the acceleration of this system.
a=(F1-F2)/(mA+mB+mC+mD). a = .3793m/s^2
Then consider A and B as a whole.
So F1-Tx=(mA+mB)*a
Solve for Tx, which = 66.69N
The correct answer is 74.7N... i really don't know what I'm doing wrong, any help / hint would be greatly appreciated.
Thanks!