Which of the following statements or expressions is most nearly associated with kepler's first law of planetary motion? (2 points) p2 = a3 planetary orbits are in the shape of an ellipse. a planet moves fastest when it is farthest from the sun. the distance to a planet is proportional to the time it takes the planet to complete an orbit.

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.