Apps not working

[GalaxytabA1]

My tab just fell on the table very lightly there was not scratch at all after that my various apps stopped working like youtube,my certain games some apps 

Can u please help wht to do it again and again shows app stopped working

[ChrisM]

Let's try a soft reset on the tablet @GalaxytabA1. This will end all processes and give the tablet a fresh start. To do this, press and hold the 'Power' and 'Volume Down' buttons until the tablet restarts.

Let us know how it goes.