Why Can't I Resolve Forces Upward?

[goldfish9776]

Homework Statement

why can't I resolve the forces in upward direction ? ( as in the sketched diagram)
the book showed that the (y component ) forces are in downward direction ... why can't be in upward direction ?

Homework Equations

The Attempt at a Solution

 

[JustANumber]

If you think a situation where the car is not moving. Then all the forces must sum up to zero. If you would take y component forces upward then you would have sum of forces that is not zero. There should be acceleration and after infinity of time cars speed would be infinity?
Downward force should be same as upward force until the (600N) is bigger than friction.

 

[SteamKing]

Homework Statement

why can't I resolve the forces in upward direction ? ( as in the sketched diagram)

Why do you want to do this?

the book showed that the (y component ) forces are in downward direction ... why can't be in upward direction ?

If you draw a free body diagram of the tow ropes, it should become fairly obvious that there are no forces in the upward (sic) direction.

After all, you can't push on a rope.

 

[goldfish9776]

Why do you want to do this?
If you draw a free body diagram of the tow ropes, it should become fairly obvious that there are no forces in the upward (sic) direction.

After all, you can't push on a rope.

I drew a free body diagram( pencil -sketched ) , but i gt the forces are in upwards direction . Lol

 

[SteamKing]

I drew a free body diagram( pencil -sketched ) , but i gt the forces are in upwards direction . Lol

The you drew the FBD wrong.

 

[goldfish9776]

The you drew the FBD wrong.

Which part is wrong?i couldn't figure it out