9th grade algebra

The force F required to stretch a string varies directly with the amount the string is stretched, S. 32 pounds is needed to stretch a string 4 inches..

A) Write a direct variation equation that relates F and S.

Answer: 32=F*S+4 is what I think.. Most likely wrong.

B) How much force is required to stretch a string 20 inches?

Answer: well, first. I would need to have my equation right.


What I think I need help with: Could I please have somebody help me fix my equation so I could solve for B? Cause I don't think my equation is right.

Thanks!
Allyson.

asked by Allyson
  1. A: force= constant*distance
    constant= force/distance= 32/4 in pounds/inch

    B: Force= (32/4)*20

    posted by bobpursley
  2. Thank you.

    posted by Allyson

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    The force required to stretch a spring varies directly with the amount the spring is stretched. A force of 29 pounds is needed to stretch a spring 39 inches. How much force is required to stretch the spring 27 inches? Answer in
  2. physics

    two springs of constants 2.0*10^3 Nm and 3.0*10^3 Nm are connected in tandem, and a mass of 5.9kg hangs vertically from this spring. 1.) by what amount does the mass stretch the combined string? 2.) By what amount does the mass
  3. Physics

    Hooke's law states that the distance, d, a string is stretched varies directly with the force, F, applied to the spring. If a force of 12 pounds stretches a spring 3 inches, how far will the spring stretch when a force of 30
  4. physics

    A small particle of mass 2.0 x 10^-19 kg is attached to a string of relaxed length 0.50 nm .The string is the black horizontal line attached to a an immovable wall on the left. The plot is a graph of the force needed to stretch
  5. Pre-calculus

    Hooke's Law states that the distance a spring will stretch beyond its natural length varies directly with the force applied to the spring. A force of 12 pounds is needed to stretch a certain spring 9 inches beyond its natural
  6. Math

    Hooke's Law states that the distance a spring will stretch beyond its natural length varies directly with the force applied to the spring. A force of 12 pounds is needed to stretch a certain spring 9 inches beyond its natural
  7. physics

    THree blocks of masses 3m, 2m and m are connected to strings A,B, and C. The blocks are pulled along a rough surface by a force of magnitude F exerted by string C. The coefficient of friction between each block and the surface is
  8. Physics

    A bar with a mass of 20kg with a length of 30m is being lifted by a string and makes an angle of 55 degrees. The string is attached to the ceiling vertically. What is the tension on the string? What is the normal force given by
  9. physics

    String instrument players can tune one string off of another - once you are happy with the tension and resulting pitch in one lower string, you put your finger down partway up the first string at the appropriate spot to make a
  10. Physics

    Two objects are connected with a string. In the quantitative treatment of the problem we assume that the string exerts a tension force of magnitude T on each of the two objects. What do we need to assume for this assumption to be

More Similar Questions