Physics

posted by .

A string of mass m=.1kg is stretched to where its length is L=20m. What is the tension force applied to the string if it takes a pulse 2 seconds to get from one end to the other?

m=kg
L=20m
T=4s
mass density =m/L = .1/20 = kg/m
Tension =?

I know v=sqrt(F_t/mass density) But I'm given two unknowns. How would I find velocity?

  • Physics -

    Well, you said v = sqrt(F/.005)
    you also said the pulse goes 20 m in 2 s
    so
    v = 20/2 = 10 m/s
    so
    10 = sqrt (F/.005)
    100 = F/.005
    F = .5 N

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Science

    Two children wish to break a string. Are they more likely to succeed if each takes one end of the string and they pull against each other, or if they tie one end of the string to a tree and both pull on the free end?
  2. physics

    Two strings, each 19.5 m long, are stretched side by side. One string has a mass of 78.0 g and a tension of 180.0 N. The second string has a mass of 58.0 g and a tension of 152.1 N. A pulse is generated at one end of each string simultaneously. …
  3. Physics

    A stretched string fixed at each end has a mass of 41.0 g and a length of 8.80 m. The tension in the string is 41.0 N. Nodes Antinodes b.What is the vibration frequency for this harmonic?
  4. Physics

    Tension is maintained in a string by attaching one end to a wall and by hanging a 2.34 kg object from the other end of the string after it passes over a pulley that is 2.00 m from the wall. The string has a mass per unit length of …
  5. physics

    Tension is maintained in a string by attaching one end to a wall and by hanging a 2.34 kg object from the other end of the string after it passes over a pulley that is 2.00 m from the wall. The string has a mass per unit length of …
  6. Physics :(( help please TT

    I have a length of string and I want to know the maximum tension the string can support. I tie one end of the string to the ceiling and the other end to a glass of mass 100 g. The glass is cylindrical, with a cross-sectional radius …
  7. physics

    A stretched string fixed at each end has a mass of 21 g and a length of 5.7 m. The tension in the string is 41.1 N. What is the vibration frequency for the third harmonic?
  8. physics

    A stretched string fixed at each end has a mass of 17 g and a length of 10.5 m. The tension in the string is 44.5 N. What is the vibration frequency for the third harmonic?
  9. physics

    A mass m = 9.0 kg is attached to the lower end of a massless string of length L = 83.0 cm. The upper end of the string is held fixed. Suppose that the mass moves in a circle at constant speed, and that the string makes an angle theta …
  10. physics

    a string of lenght l and mass m is lying on a horizontal table. a force f is applied at one of its end.tension on the string at a distance y from the end at which the fprce applied is ?

More Similar Questions