Changing the rotation of a natural satellite

[LF_Ent]

Pardon me for my ignorance -- and naivety, if this question idicates it -- but would it be possible to change the rotation of a planet or moon? We'll assume the hypothetical people attempting this project have a nearly infinite budget, but even with quadrillions of dollars, is this even plausible? Thanks.

 

[mgb_phys]

Build very big engines on the equator - push out sufficient amount of mass at high enough speed to reverse the planet/moons angular momentum.
Hit planet/moon with a very big object going very fast in the opposite direction to it's current rotation

 

[DaveC426913]

The engines don't have to be big if you are very patient. All depends on your success criteria.

 

[LF_Ent]

Oh. I thought about the first one, but wasn't sure if it would really work. Thanks.