You are standing in an elevator as it starts to move downward, accelerating for a moment. Which of these is true at that moment?
a. The net force on you changes from zero to downward as the elevator begins accelerating.
b. Your mass is slightly reduced as the elevator begins accelerating.
c. You momentarily have free-fall acceleration (9.8 m/s²) downward as the elevator begins accelerating.
d. Your weight is slightly reduced as the elevator begins accelerating.