Choose all the answers that apply.

Stars:

are classified by temperature and color
are made mostly of hydrogen and helium
orbit the sun
are mostly found between Mars and Jupiter
generate their own heat and light

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.