why wont my mac start up?

[Carl]

i have had my macbook pro for about 2 years, and i recently had an incident with it. as i got out of bed i dropped my mac book on the floor, it landed directly on he bottom by the mouse, it instantly froze up on impact, i panic t and because the mouse wouldn't move or anything i was forced to shut it down by holding down the power button, when i turned it back on after a while thew apple logo came up but then turned into this grey circle with a line, image attached because i can explain what it looks like this http://www.etftrends.com/wp-content/uplo...2.svg_.png