Physics

As part of a physics experiment, you stand on a bathroom scale in an elevator. Though your normal weight is 690 N, the scale at the moment reads 588 N.

(a) Is the acceleration of the elevator upward, downward, or zero?

(b) Calculate the magnitude of the elevator's acceleration.
m/s2

(c) What, if anything, can you say about the velocity of the elevator?

Explain.

please I need help. Thanks

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
  1. You don't have to give me the answer but explaining a way to get there would help

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  2. Weight is the force with which the object presses the stationary support. Weight may be less or greater than the force of gravity (mg) in dependence on the downward or upward motion, => Weight = N, but directed in the opposite direction

    vector (ma)= vector (mg)+vector( N)
    for upward motion: -ma=mg-N
    N=ma+mg
    for downward motion: ma=mg-N
    N= mg –ma - this is the given case
    mg=690 N, N=588N, m=mg/g=690/9.8=70.4 kg
    588 =690 - ma
    a=( 690-588)/70.4= 1.45 m/s²

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    A 75.0-kg person stands on a scale in an elevator. What does the scale read (in N) when the elevator is at rest? What does the scale read (in N) when the elevator is climbing at a constant speed of 3.0 m/s? What does the scale

  2. 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.

  3. Physics

    A 91 kg man stands on a spring scale in an elevator. Starting from rest, the eleva- tor ascends, attaining its maximum speed of 1.7 m/s in 1.07 s. It travels with this constant speed for the next 5 s, undergoes a uniform negative

  4. physics

    A person who normally weighs 700 N is riding in a rather swift elevator that is moving at a constant speed of 9.8 m/s. If this person is standing on a bathroom scale inside the elevator, what would the scale read?

  1. PHYSICS

    A 70 KG man is standing on a scale inside an elevator. Calculate the reading on a scale after the cable breaks and the elevator goes into free fall.

  2. physics

    Struggling with this problem: A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 848 N. As the elevator starts to move up, the scale reading increases to 968 N, then

  3. physics

    If you stand on a bathroom scale, the spring inside the scale compresses 0.50 mm, and it tells you your weight is 760 N. Now if you jump on the scale from a height of 1.0 m, what does the scale read at its peak?

  4. Physics

    A 650 N student stands on a scale in an elevator. As the elevator starts to move, the scale reads 780 N. a. Find tha acceleration. b. Is the elevator going up or down?

  1. physics

    A 70kg man stands on a bathroom scale in an elevator. As the elevator starts moving, the scale reads 90kg Is the elevator acceleration up or down, is the elevator moving up or down?

  2. physics

    A 69 kg person is standing on a bathroom scale (calibrated in Newtons) in the middle of an elevator. Determine the reading on the scale when the elevator is moving downward at a constant velocity of 2.2 m/s. (3T, 1C) please help

  3. Physics

    "A fish hangs from a spring scale supported from the roof of an elevator. If the elevator has an upward acceleration of 1.2m/s^2 and the scale reads 200N, under what circumstances will the scale read 150N? What will the scale read

  4. physica

    A 73kg person stands on a scale in an elevator. - What does the scale read (in N) when the elevator is accelerating upward at 2.8 m/s2 ? - What does the scale read (in N) when the elevator is accelerating downward at 2.8 m/s2 ?

View more similar questions or ask a new question.