The Gravity Control Problem

[truth]

 
The problem with using gravity as a useful force is its ability to pass through basically anything unaffected.

My challenge to this group is to identify any material or method that reduces or increases the force of gravity.

The physics are well known. Many attempts to use gravity have all failed due to the force always remaining constant.

The only workable solution must therefore be something that somehow alters the force in a specific location.

This is an opportunity for the true masters to show their stuff.   

[AB Hammer]

Greetings truth

Manipulation and leverage. If you cant beat it join it. Just that simple. KIND OF.

[overtaker]

This is an easy one.    " Method of reducing or increasing the force of gravity "

On a gravity wheel mount one weight close to the axle at the 9 o'clock position and another of equal weight at the 3 o'clock position at the perimeter of the wheel. 

Now let go.

One weight raises and one weight falls.

I would say this qualifies as reducing the force of gravity on the one weight. 

[brian334]

My challenge to this group is to identify any material or method that reduces or increases the force of gravity.

The solution is to change the relative weight of a object.
You ask?   
Relative to what?
A liquid.

[brian334]

The problem with using gravity as a useful force is its ability to pass through basically anything unaffected.

The complete opposite is true, gravity pulls down a liquid pushing
lighter things up.