Can a particle be affected by gravity?

Hi I am very new to Unity but I've been catching on pretty quick. I am trying to get a particle to be affected by gravity. I've been looking around the forums and doc's but no luck. I tried putting a rigidbody component onto the my particle system but it still isn't affected by gravity. It just shoots off in the direction I give it. Am I just missing something simple here or what?

Unity 5.0: there’s a Gravity Modifier input that lets you determine the effect of world gravity on the particles.70325-screen-shot-2016-05-18-at-72752-pm.png

in the particle animator component change the force on the y to be -10. this is like gravity

and works fine :)