A body rolled on ice witha velocity of 8 ms^(-1)comes to rest after traveling a distance of 4m for this situation which of the following pair is correct

A body rolled on ice witha velocity of 8 ms^(-1)comes to rest after tr

1.	A body rolled on ice witha velocity of 8 ms^(-1)comes to rest after traveling a distance of 4m for this situation which of the following pair is correct
Answer» acceleration =+8 `ms^(-2)` COEFFICIENT of friction =0.8 aqcceleration =+4 `ms^(-2)` coeffiecientof friction =0.4 accelearation =-8 `ms^(-2)`coefficient fo friction =0.816 acceleartion =-`16MS^(2)` coefficent of friction =1.62 Solution :`u=8 m//s , v=00,s=4m , a= ?` `v^(2)-u^(2)= 2 as` `0^(2)-8^(2)=2a xx 4` `-64 =8a` `a= (-64)/(8) =-8ms^(-2)` `a= \|-8\| = 8 ms^(-2)` COEFFICIENTOF friction`mu= (f )/(R )=- (ma)/( mg)` `(a)/(G) = (8)/(9.8)= 0.816`