My suv ford explorer the motor turns over i numped it once now it won't start?

I drove it to work parked it for 8 hours won't start. All the lights radio comes on any ideas what it could be. Yest the battery and alternator that's Good

Big Fords are famous for corroding the INSIDE of the positive ( red wire ) battery cable clamp. Pull that clamp off the battery post, then scrape both the INSIDE of the clamp & the sides of the post with a small pocket knife blade. If that helps, most all car parts stores carry a small wire brush designed just for that job. Also, around 2002, Ford tried-out some light-weight sheet-metal battery cable clamps, instead of the old fashioned 'lump' of lead clamps. They didn't work. So if your truck has those sheet-metal clamps, you'll have to get them replaced with the good old fashioned lump-of-lead clamps.

Could be the starter solenoid if all your battery connections are good and you have a full charge on the battery. If it is that, it will just click once when you try to turn it over. You can peck on the starter solenoid sometimes and get another start out of it. However, usually this problem gradually comes on as failed starts occasionally that progressively gets worse. I would check you battery connections before I did anything. Then, if you are not sure what it could still be and your battery is showing full charge, then take it to a shop or have a mechanically inclined buddy take a look at it. Without being there in person and testing voltage on your battery and alt output readings when it is running, its hard to tell.