Tolong dijawab plisss

Dik = m = 100Kg
g =9,8Kg m/s²
w = 100Kg x 9,8N/Kg =980N
Dit = Fk=......?
Jwb = Fk=1/2 x w
=1/2 x 980 N
=490N
(maaf klo slh)