If an object is moving at #120 m/s# over a surface with a kinetic friction coefficient of #u_k=8 /g#, how far will the object continue to move? Physics Forces and Newton's Laws Frictional Forces 1 Answer ali ergin Mar 23, 2016 #Delta x=900" m"# Explanation: #"Object has a kinetic energy due to motion"# #"The kinetic energy of object is changed to heat energy by"# #"the friction force"# #F_f=mu*m*g" "mu=8/g# #F_f=8/cancel(g)*m*cancel(g)# #1/2*m*v^2=F_f*Delta x# #1/2 *cancel(m)*v^2=8*cancel(m) *Delta x# #1/2*120^2=8*Delta x# #Delta x=120^2/16# #Delta x=14400/16# #Delta x=900" m"# Answer link Related questions Question #d6539 Question #242b7 Question #6bde4 Question #50c79 Question #a2018 Question #f7a62 Question #27931 Question #0b375 Question #d70af Question #dab6f See all questions in Frictional Forces Impact of this question 1220 views around the world You can reuse this answer Creative Commons License