- #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