Worn strut or shock absorber?
Worn strut bearing at top of strut?
Loose suspension parts?
Worn ball joint?
If the impact was severe enough then the car metal structure could be forced forward enough to warp the hood or shift it out of alignment. A knock or bump is less likely to have this effect though.
There are a few different things which could cause wheel shaking and thumps when hitting a big bump. The most likely cause however, is that the struts need to be replaced.
An independent suspension system
fan is hitting where the dent in the oil pan is
Could be a loose or worn strut or strut mount
It is Knock
While driving, hit something probably while going over a bump or hitting a rock. Object can be low enough to clear front clip and cause severe damage.
it may have shaken somthing losse
You will hear a loud grind or metalic squeek or knock when you go over a speed bump. It will also cause the whole suspension assembly to vibrate or wobble at high speed. It also can affect handling in corners.
If your front-end is loose after hitting a bump, but not at speed, when you use the brakes, or when you turn - then the most likely cause is going to be your suspension.
velocity
A bump is not bad. It is just an area of swelling. If it was a hard blow or you passed out at all.