 #1
MrBeans
 2
 0
 Homework Statement:

A 4kg mass sits on a frictionless table. A string is attached and leads to the right off the table, over a pulley where it then supports a 2 kg mass. The 4 kg mass is being pulled to the left along the table by a 20 N force. What is the tension in the connecting string?
A. 13N
B. 19.7N
C. 6.4N
D. 35N
 Relevant Equations:

F = ma
T = mg  ma
I got 13N but is that right because apparently, it's wrong
Here's my work:
F = mg = 2(10) = 20N
F = ma
a = F/m = 20/4+2 = 20/6 = 10/3 = 3.3m/s^2
T = mg  ma T = (2kg)(10m/s^2)  (2kg)(3.3m/s^2) = 13.4 N
I appreciate it! And if I'm wrong could you show how you got your answer? Thanks
Here's my work:
F = mg = 2(10) = 20N
F = ma
a = F/m = 20/4+2 = 20/6 = 10/3 = 3.3m/s^2
T = mg  ma T = (2kg)(10m/s^2)  (2kg)(3.3m/s^2) = 13.4 N
I appreciate it! And if I'm wrong could you show how you got your answer? Thanks