You are standing still in an elevator, with a briefcase hanging from your motionless hand. As the elevator rises toward the top of the building, you are doing
A. zero work on the briefcase and the elevator is doing zero work on you. [3.8% picked]
B. (positive) work on the briefcase and the elevator is zero work on you. [0.4% picked]
C. zero work on the briefcase and the elevator is doing (positive) work on you. [74.5% picked]
D. (positive) work on the briefcase and the elevator is doing (positive) work on you. [21.3% picked]
Answer:D
You are standing still in an elevator, with a briefcase hanging from your motionless hand. As the elevator rises toward the top of the building, you are doing
A. zero work on the briefcase and the elevator is doing zero work on you. [3.8% picked] B. (positive) work on the briefcase and the elevator is zero work on you. [0.4% picked] C. zero work on the briefcase and the elevator is doing (positive) work on you. [74.5% picked] D. (positive) work on the briefcase and the elevator is doing (positive) work on you. [21.3% picked]