An ideal spring with a spring constant (force constant) of is stretched from equilibrium to 2.9 m. How much work is done in the process?
A) 93 J
B) 186 J
C) 47 J
D) 121 J
Question 2
An object that is 4.0 cm tall is placed 15 cm in front of a concave mirror of focal length 20 cm.
(a) Where is the image formed and how far is it from the mirror?
(b) How tall is the image?