Physics

posted by .

"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 if the elevator cable breaks?"

There was another part of the question that I had figured out. The true force of gravity on the fish is 1.8*10^2N.

  • Physics -

    F = m a
    force down on fish = m g
    force up on fish = 200
    acceleration up =1.2
    so
    200 - 9.8 m = 1.2 m
    11 m = 200
    m = (200/11)

    then
    150 - 9.8(200/11) = (200/11)a

    (200/11) (9.8+a) = 150
    9.8+a = 8.25
    a = -1.55 downward

    well if the cable breaks, a = 9.8 dwon
    F - 9.8 m = m (-9.8)
    F = 0

  • Physics -

    Thank you for answering both questions! I understand them now.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Algebra-based Physics

    A large fish hangs from a spring balance supported from the roof of an elevator. If the elevator has an upward acceleration of 2.65 m/s^2 and the balance reads 70.0 N, what is the true weight of the fish?
  2. Physics

    *I really don't know how to get started. I have done lots of the homework, but this one (and a couple of others) are really giving me PROBLEMS.* A large fish hangs from a spring balance supported fromthe roof of an elevator. If the …
  3. Physics

    A man measures the acceleration of an elevator using a spring balance. He fastens the scale to the roof, and suspends a mass from it. If the scale reads 98N when the elevator is at rest, and 93N when the elevator is moving. a) what …
  4. Physics

    A man measures the acceleration of an elevator using a spring balance. He fastens the scale to the roof, and suspends a mass from it. If the scale reads 98N when the elevator is at rest, and 93N when the elevator is moving, (a) what …
  5. physics

    A large fish hangs from a spring balance supported from the roof of an elevator. If the elevator has an upward acceleration of 2.85m/s^2 and the balance reads 60.0N , what is the true weight of the fish?
  6. Physics

    You stand on a bathroom scale that rests on the floor of an elevator. Standing on the scale compresses internal springs and activates a dial that indicates your weight in newtons. When the elevator is at rest, the scale reads 600 N. …
  7. physics

    A 80-kg man stands on a bathroom scale inside an elevator. (a) The elevator accelerates upward from rest at a rate of 1.40 m/s2 for 1.50 s. What does the scale read during this 1.50 s interval?
  8. physics

    Mia is on a planet where g=10 m/s^2. she is standing on a bathroom scale in an elevator. the scale reads 500N. the elevator accelerates upward with an acceleration of 5.0m/s^2 what would the scale read now
  9. Physics

    Riding in an elevator, a man notices that he feel heavier or lighter based when the elevator speeds up or slows down. He stands on a bathroom scale in the elevator to take some measurements. Assume that his mass is 85 kg. a. What is …
  10. physics

    A 61-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 815 N. What is the acceleration of the elevator?

More Similar Questions