A cargo plane is flying horizontally at an altitude of 14.7 km with a constant speed of
994 km/hr when a large crate slides out of
the rear of the plane. A conceptual sketch is
shown.
994 km/hr
14.7 km
x
How long does it take the crate to hit
the ground? The acceleration of gravity is
9.81 m/s
2
.
1. 54.7443
2. 47.3562
3. 51.0841
4. 49.4619
5. 48.8397
6. 52.2676
7. 45.3776
8. 53.9944
9. 53.425
10. 50.0764
Answer in units of s

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.