Apackage is dropped from a helicopter moving upward at 15 m/s. if it takes 12 s before the package strikes the ground, how high above the ground was the package when it was released if air resistance is negligible? a package is dropped from a helicopter moving upward at 15 m/s. if it takes 12 s before the package strikes the ground, how high above the ground was the package when it was released if air resistance is negligible? 318 m636 m530 m424 m

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.