physics

posted by .

when a 2.50 kg object is hung vertically on a certain light spring described by hookes law the spring stretches 2.76 cm. A) what is the force constant of the spring. B) if the 2.50 kg object is removed how far will the spring strecth if a 1.25 kg block is hung on it. C) how much work must an external agent do to strecth the same spring 8.00cm from its unstreched position.

  • physics -

    Wo = mg = 2.50kg * 9.8N/kg = 24.5N. =
    Weight of objedt.

    A. Fk = Wo / d = 24.5 / 2.76 = 8.88N/cm

    B. d=(1.25kg/2.50kg) * 2.76cm = 1.38cm

    C. F = 8.88N/cm * 8cm = 71N.
    W = Fd = 71 * 0.0888m = 6.31 Joules.

  • physics -

    In your "C" answer, second line, you should have used 0.08m, not 0.0888m (that was the K constant).

    Therfore, the result is W=Fd= 71*0.08= 5.68 Joules

  • physics -

    2.84J

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. science(physics)

    a object potential energy is described as 1/2kx^2. what does k and x represent?
  2. physic

    Hooke's law describes a certain light spring of unstretched length 30.0 cm. When one end is attached to the top of a door frame, and a 8.40-kg object is hung from the other end, the length of the spring is 40.00 cm. (a) Find its spring …
  3. physics

    When a 4.48 kg mass is hung vertically on a certain light spring that obeys Hooke's law, the spring stretches 2.68 cm. How much work must an external agent do to stretch the spring 3.96 cm from its unstretched position?
  4. physics

    When a 2.60-kg object is hung vertically on a certain light spring described by Hooke's law, the spring stretches 2.30 cm. (a) What is the force constant of the spring?
  5. Physics

    A spring is hung from a ceiling, and an object attached to its lower end stretches the spring by a distance of 5.00 cm from its unstretched position when the system is in equilibrium. If the spring constant is 54.1 N/m, determine the …
  6. Physics

    How do you determine the force constant of a spring when given the mass of an object being hung vertically, and the distance the spring stretches?
  7. Physics

    When a 3.00-kg object is hung vertically on a certain light spring described by Hooke's law, the spring stretches 3.07 cm. (a) What is the force constant of the spring?
  8. physics

    When a 2.50-kg object is hung vertically on a certain light spring described by Hooke's law, the spring stretches 3.13 cm. a)What is the force constant of the spring?
  9. PHYSICS

    A spring is hung from a ceiling, and an object attached to its lower end stretches the spring by a distance d = 7.70 cm from its unstretched position when the system is in equilibrium as in the figure below. If the spring constant …
  10. Physics

    When a 2.00-kg object is hung vertically on a certain light spring described by Hooke's law, the spring stretches 3.17 cm. (a) What is the force constant of the spring?

More Similar Questions