A vertically mounted spring (k = 900 N/m) is compressed by 33 cm relative to its unstrained length. A mass (m = 0.2 kg) is placed at rest against the spring. When the spring is released, the mass is __________.

a) Pulled downward by gravity
b) Ejected sideways
c) Launched upward
d) Stays at rest

4.30 mWhat
What is the order of adult learning concepts order evaluation, introduction, practice, mastery, illustration, reflection?
Are the two triangles below similar due to AA Triangle Similarity Theorem? How can I solve this problem?