A car moving from A to D through points C and D bt BC=2AB=2CD called v1,v2,v3 segments AB, BC, CD with v2=2v1=4v3 respectively. Vtb of segment BD is 20km/h and travel time of car on segment AB is 1h. Calculate v1 and AD?

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.