#v_f^2=v_i^2-2*a*Delta x#
#v_f:"represents the final velocity of object"#
#v_i:"represents the initial velocity of object"#
#a:"represents deceleration of object"#
#Delta x:"represents the displacement of object" #
#"Where; "v_i=5 " "m/s " ; " v_f=5/2 " "m/s" ; "Delta x=25" "m#
#(5/2)^2=5^2-2*a*25#
#25/4=25-2*a*25#
#50*a=25-25/4" ; "50a=75/4" ; "a=75/200#
#a=3/8" "m/s^2#
#F_f=m*a#
#F_f:"represents the friction force between contacting surface"#
#N:"represents the normal force"#
#mu_k:"represents the coefficient of kinetic friction"#
#N=m*g#
#F_f=mu_k*m*g#
#mu_k*cancel(m)*g=cancel(m)*a#
#mu_k=a/(g)#
#mu_k=(3/8)/(9.81)#
#mu_k=3/(8*9.81)#
#mu_k=3/(78,48)#
#mu_k=0.038" , has no unit"#
