Physics, please help

Copper has a breaking stress of about
3 × 10^8 N/m2.

What is the maximum load that can be
hung from a copper wire of diameter 0.5 mm?
Answer in units of N.

If 55% of this maximum load is hung from the copper wire, by what percentage of its length will it stretch?
Answer in units of %.

I got the first one which is 58.90486N. I have no idea how to do the second though.

  1. 👍
  2. 👎
  3. 👁
  1. Force=E*a*deltaL/L

    solve for delta L/L
    E is Youngs modullus for Copper, look that up

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Solid Mechanics

    A cast iron block of 5Cm^2 cross section carries an axial compressive load of 50KN.Calculate the magnitude or normal and shear stresses on a plane whose normal is inclined at 30 the axis of the block,also determine the

  2. Physics (Stress & Strain)

    A hole 3cm in diameter is to be punched out of a steel plate 8cm thick. The shear stress of the material is 670GPa. What load is required on the punch? 3cm = 0.03m 8cm = 0.08m Lateral surface area (As) = pi*D*h = 3.1416 * .03m *

  3. Solar Energy

    Consider a PV module with the following parameters as measured at STC (Standard Testing Conditions): Voc = 55 V; Isc = 5 A; Impp = 4.7 A; Fill Factor = FF = 75% ; Efficiency = 19.75%. Suppose that under normal operation at STC

  4. Materials Science

    A hollow cylinder with outer radius r0 and inner radius ri is loaded by a uniformly distributed load q across its length L. The beam is supported by a roller at its left end and a pin L5 from its right end. What is the maximum

  1. Algebra

    The maximum load a beam will support varies directly with the square of the diagonal of the beam's cross section.A beam with diagonal 6 inch will support a maximum load of 108 pounds. What load will a beam with a 10 inch diagonal

  2. physics

    A load of 80N extends a spring by 8cm. When the load is replaced by a copper block, the extension produced is 10cm. Calculate the weight of the copper block, assuming that the elastic limit of the spring is not exceeded.

  3. Focus on the Child, Part 2

    Which of the following statements is true of children and stress? A. Children's needs should never be postponed or they'll suffer damaging stress effects. B. Children need to face some stress and problems to develop strength and

  4. Health

    Which statement is NOT true? 1.Some people do not have stress ** 2. Stress is normal and can be positive or negative 3. Over a long period of time, stress can harm your health 4. Stress cannot always be avoided, but it can be

  1. physics

    A mass 5kg is whirled in a horizontal circle @ 1 end of a string 50cm long,the other end being fixed. If the string when hanging vertically will just support a load of 200kg mass without breaking,find the maximum whirling speed in

  2. Physics

    Which one of the following stresses would be most likely to cause a bone to fracture? A) tensile stress B) compressive stress C) sheer stress D) bulk stress

  3. physics

    a rope can withstand a maximum tension force of 450n before breaking if we use the rope to pull a 32kg bucket of water from a well what is the maximum acceleration upward we can use without breaking the rope

  4. physics

    A strip of rubber originally 75 mm long is stretched until it is 100 mm long. a.What is the tensile strain b.Why has the answer no units? c.The greatest tensile stress which steel of a particular sort of a particular sort can

You can view more similar questions or ask a new question.