- #1

- 6

- 0

## Homework Statement

When a 45-kg person steps on a scale in an elevator, the scale reads a steady 480 N. Which of the following statements must be true? There could be more than one correct choice.

a) The elevator is accelerating upward at a constant rate

b) The elevator is moving downward at a constant rate

c) The elevator is moving upward at a constant rate

d) The elevator is accelerating downward at a constant rate

e) From the given information, we cannot tell if the elevator is moving up or down

## Homework Equations

F = ma

Fg = mg

## The Attempt at a Solution

From the equation, I know that the Fg is (45)(9.8) = 441.

I think the answer is a. But my textbook says that it is both A and E. Can someone help explain why? Thanks in advance :)