## kl0723 one year ago sum of the forces in x direction:

1. kl0723

|dw:1441825111887:dw|

2. kl0723

$\sum F_x = ?$

3. anonymous

T for tension ?

4. kl0723

yes, those are the given forces, I just need to find the sum of those forces on x direction

5. anonymous

what is $$F_e$$ ?

6. kl0723

another given force

7. anonymous

$$\Large F_x=T \sin 15 -F_e$$ as u said early but it'not zero as the ball keep moving ok ?

8. anonymous

you need to substitute each force with it's value

9. kl0723

why is it sin and not cos?

10. anonymous

see if this makes sense |dw:1441826386181:dw|