How Do You Solve a Block on a Slope with a Given Weight?

[goodOrBad]

Homework Statement

If given G find weight Q necessary for a uniform descent of G

Relevant Equations

Fx=0
Fy=0

This is my attempt of solving it

 

[kuruman]

The angle between the string and the face of block G does not look like 20^o to me. You will have to recalculate the components of the tension perpendicular and parallel to the incline.

 

[goodOrBad]

It is given as 20 but my drawing is not faithful

 

[goodOrBad]

it looks more like this

 

[goodOrBad]

or should the angle of T1 be 50 due to the slope being 30deg and the rope 20deg so 50deg
and that means angle around the pulley is 50+90=140deg

 

[haruspex]

or should the angle of T1 be 50 due to the slope being 30deg and the rope 20deg so 50deg
and that means angle around the pulley is 50+90=140deg

Yes.
But the block cannot descend uniformly since that angle will change.

 

[goodOrBad]

Okay but without the unfiorm descent would this be it

 

[haruspex]

Looks right.