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Answer 1

hlo ...

Explanation:

as we know that there would be friction so it will stop ..

when it will be stop its . speed would be V

so now .. F= ma . a = f/m

a= 50/20 a=5/2

( v-u)/t= 5/2

now t=6

now s = ut +1/2 at²

use it then ans is