Posted by **Sabrina** on Tuesday, February 20, 2007 at 11:13am.

an 800 N person stands on a scale in an elevator. What is his apparent weight when the elevator is accelerating upward at 2 m/s^2? B) what5 is his apparent weight when the elevator is acc. downward at 2m/s^2? c) what is his apparent weight when the elevator is moving downward at a constant velocity of 2m/s^2?

Try setting up a force balance on the person. "The apparent weight" W is the force that would act upward from a measuring scale or the floor, and the true weight M g acts downwards.

According to Newton's second law,

W - M g = M a, is a is measured postive upwards.

All three parts of the problem can be solved with this equation. a = +2 m/s^2 in (a), -2 m/s^2 in (b) and 0 in (c). Solve for W in each case.

## Answer This Question

## Related Questions

- Physics - A 83.0-kg person stands on a scale in an elevator. What is the ...
- Physics - Chapter 4, Problem 36 Incorrect. A 77.2-kg person stands on a scale ...
- Physics - A 72.0-kg person stands on a scale in an elevator. What is the ...
- physics - A 72.2-kg person stands on a scale in an elevator. What is the ...
- Physics - A 96.6-kg person stands on a scale in an elevator. What is the ...
- physics - A 84.5-kg person stands on a scale in an elevator. What is the ...
- Physics - 74.0-kg person stands on a scale in an elevator. What is the apparent ...
- Physics - A 97.0-kg person stands on a scale in an elevator. What is the ...
- Physics - A 76.6-kg person stands on a scale in an elevator. What is the ...
- Physicss - Chapter 4, Problem 40 A 94.9-kg person stands on a scale in an ...

More Related Questions