If the work done to stretch an ideal spring by 4.0 cm is 6.0 J, what is the spring constant (force constant) of this spring?
A) 6000 N/m B) 7500 N/m C) 300 N/m D) 3000 N/m E) 3500 N/m
Question 2
You separate two magnets that are initially held together by magnetic forces. How does this affect the mass and energy of the system of magnets?
A) It creates additional mass, located within each magnet, but no additional energy.
B) It creates additional mass, located within each magnet, and also additional energy.
C) It creates neither additional energy nor additional mass.
D) It creates additional mass, located in the space between the two magnets, and also additional energy.
E) It creates additional energy, located in the space between the two magnets, but not additional mass.