Can gravitational force be turned into speed or propulsion?

Of course. Drop something off a tower, you'll see it gain speed.

 

 

(I was also going to mention gravitational slingshot, as used by several space probes, but that works more by robbing a little orbital momentum from the larger body; not sure if that meets your needs.)

Edited June 15, 201510 yr by pzkpfw

Okay so the sun has a gravitational force that's 28 times earth's

Or let me rephrase that. the force of gravity is 28 times greater on the sun than the earth.

Okay so the sun has a gravitational force that's 28 times earth's

Or let me rephrase that. the force of gravity is 28 times greater on the sun than the earth.

 

That is correct.

http://hyperphysics.phy-astr.gsu.edu/hbase/solar/sun.html

 

(Although, as the Sun doesn't have a surface, I'm not sure it is very meaningful.)

Edited June 15, 201510 yr by Strange

Dang I was unaware 😨... My big question is could we use an object gravitational force to be turned into speed?

Gravity assist.

High powered slingshot. Got it thank you.