A raindrop falls vertically down beside a tall building. It takes 0.5s for the raindrop to pass by the second-floor window, which is 1.5 m tall. If the bottom of the window is 3.5m from the ground, find the time for the raindrop to go from the bottom of the window to the ground. Neglect air resistance. Please explain as much as possible, thanks in advance

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.