Post a New Question

Physics

posted by .

A 55 kg person stands on a scale in an elevator that accelerates downward at 3 m/s2.

a) What is the scale reading?
N

b) What is the person's weight?
N

  • Physics -

    a. F= ma = 55 * 3 = 165 N.

    b. a + g = -3 m/s^2,
    a - 9.8 = -3,
    a = -3 + 9.8 = 6.8 m/s^2.

    F = ma = 55 kg * 6.8 m/s^2 = 374 N =
    The person's wt.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 591 N. As the elevator later stops, the scale reading is 391 N. Assume the magnitude of the acceleration is the same during starting …
  2. physics

    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?
  3. Phys

    A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.74 of the person's regular weight. Calculate the magnitude of acceleration of the elevator. Find the direction …
  4. physics

    A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.71 of the person's regular weight. Calculate the acceleration of the elevator, and find the direction of …
  5. Physics

    A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 600 N. As the elevator later stops, the scale reading is 396 N. Assume the magnitude of the acceleration is the same during starting …
  6. physics

    You measure your weight by stepping on a spring scale inside an elevator. If elevator accelerates either upward or downward, the spring scale gives a reading different from your weight. a) Calculate how much a 70 kg person weigh a) …
  7. Physics

    A 160lb person steps into an elevator and stands on a bathroom scale. what is the weight on the scale when the elevator accelerates upwards at 2ft/s^2
  8. physics

    A person stands on a bathroom scale on a motionless elevator. When the elevator begins to move, the scale briefly reads 200 percent of the person's regular weight. Calculate the acceleration of the elevator, a_{elevator}. Use SI units
  9. Physics Dynamics

    A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.69 of the person's regular weight. Calculate the magnitude of the acceleration of the elevator.
  10. physics

    a 75kg person is standing on a scale in an elevator, the scale gives a readout in newtons(you have to use a free body diagram)determine the reading on the scale in newtons in each of the following situations, when the elevator is not …

More Similar Questions

Post a New Question