physics

Sir Robert Hooke (1635-1703), studied the elastic properties of springs and formulated the law that bears his name. Hooke found the relationship among the force a spring exerts, F, the distance from equilibrium the end of the spring is displaced, x, and a number k called the spring constant (or, sometimes, the force constant of the spring). According to Hooke, the force of the spring is directly proportional to its displacement from equilibrium: F=-kx. The negative sign indicates that the force that the spring exerts and its displacement have opposite directions.

So, here is the funny question for you. You create a baby bouncer using an elastic cord (consider it to be a spring). Use Hooke's law to determine how far the spring would stretch downward once the baby is placed in the seat, if the spring constant k = 500 N/m, and the baby has a mass m = 11 kg. Hint: weight of the baby (gravitational force on it) is the force exerted on the spring. In equilibrium (when baby is at rest) it's magnitude becomes equal to the elastic force exerted by the spring on baby: F_g = F_e.

  1. 👍 0
  2. 👎 0
  3. 👁 324

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    Can you please help me find the theory of Robert Hooke on Wave Explanation of Colors. Please... My report about this is due on Monday. Thank you for helping. God bless. According to (Broken Link Removed) , "Robert Hooke

    asked by imee on July 30, 2006
  2. physics

    find the average of a block being propelled propelled by an elastic band. very sorry to disturb Mr bobpurlsey again. i am very thankful to you replies. the only problem that lies in the answer is that i haven't been taught hooke's

    asked by james on June 13, 2007
  3. physics help!

    Two springs P and Q both obey Hooke’s law. They have spring constants 2k and k respectively.The springs are stretched, separately, by a force that is gradually increased from zero up to a certain maximum value, the same for each

    asked by Taylor on October 28, 2014
  4. Solid State Physics

    How can an elastic deformation of a crystal be described microscopically and why would you expect Hooke's law to hold for a small strain?

    asked by curiousmind on November 12, 2018
  5. PHYSIS

    A 53.0 kg circus performer oscillates up and down at the end of a long elastic rope at a rate of once every 6.60 s. The elastic rope obeys Hooke's Law. By how much is the rope extended beyond its unloaded length when the performer

    asked by Mark on December 20, 2015
  1. physics

    A 55.0 kg circus performer oscillates up and down at the end of a long elastic rope at a rate of once every 7.20 s. The elastic rope obeys Hooke's Law. By how much is the rope extended beyond its unloaded length when the performer

    asked by Katie on March 23, 2012
  2. Physics

    For Hooke's Law, the one about springs and mass, is the mass M a unit of g or kgs?

    asked by TP on March 26, 2009
  3. Phsyics

    Hooke's Law and Young's Modulus Can someone please explain this to me. How can one determine if a material behaves according to Hooke's law?

    asked by Mary on October 24, 2008
  4. physics

    A 53.6 kg circus performer bobs up and down at the end of a long elastic rope at a rate of once every 2.80 s. The elastic rope obeys Hooke's law. Find how much the rope is extended beyond its unloaded length when the performer

    asked by emily on November 28, 2012
  5. physics

    sorry mr bob purlsey again to annoy you. so i did all my calculations and read about hooke's law yesterday and presented to my teacher. however i was not allowed to used hooke's law because we haven't learned it yet and i did not

    asked by physics(sorry) on June 14, 2007

More Similar Questions