Posted by **Brandon** on Sunday, February 20, 2011 at 10:53pm.

3 part question:

A 52-kg girl weighs herself by standing on a scale in an elevator. What does the scale read when:

a.)the elevator is accelerating downward at 2.5 m/s2?

b.)the elevator is accelerating upward at 2.5 m/s2?

c.)the elevator is ascending at 10 m/s but its speed is decreasing by 6 m/s in each second?

- physics -
**drwls**, Sunday, February 20, 2011 at 11:20pm
I assume the scale reads in kg.

a) [(g-2.5)/g] x 52 = 38.7 kg

b) [(g + 2.5)]/g x 52 =

c) [(g -6)/g] x 52 =

The speed does not matter but the accleration does. 6 m/s^2 is the deceleration rate.

- physics -
**Brandon**, Sunday, February 20, 2011 at 11:48pm
Thanks for your help but the answers were wrong some how. On my homework it says to answer in Newtons. I know F=ma but w/ these stipulations i don't know how to solve it

- physics -
**drwls**, Monday, February 21, 2011 at 6:01am
I've never seen a weight scale that reads in Newtons. If you want Newtons, multiply my previous answers by 9.8 m/s^2 (same as 9.8 N/kg)

## Answer this Question

## Related Questions

- Physics - You stand on a bathroom scale that rests on the floor of an elevator. ...
- science - Suppose you hang an object of weight W by a string from a hanging ...
- Help Physics - A child with a mass of 39 kg stands on a spring scale inside an ...
- Physics - A man measures the acceleration of an elevator using a spring balance...
- Physics - A man measures the acceleration of an elevator using a spring balance...
- physics - a person is standing on a scale in an elevator that slowing down at a ...
- Physics - Vertical Motion - A 64kg person is standing on a scale in an elevator...
- Physics - Florence who weighs 120lb stands on a bathroom scale in an elevator. ...
- Physics - "A fish hangs from a spring scale supported from the roof of an ...
- Physics - A 76.6-kg person stands on a scale in an elevator. What is the ...