Math help

9). Hooke’s Law. The distance d when a spring is stretched by a hanging object varies directly as the weight w of the object. If the distance is 29 cm when the weight is 4 kg what is the distance when the weight is 9 kg?
10). Find the variation constant and an equation of variation where y varies inversely as x and y =9 when x= 17?
11). It takes 8hr for 9 cooks to prepare the food for a wedding rehearsal dinner. How long will it take 3 cook to prepare the dinner? Also what variation applies Inverse or Direct?
12). The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car traveling 80 mph can stop in 360ft, how many feet will it take the same car to stop at a speed of 70?

  1. 👍 0
  2. 👎 0
  3. 👁 123
asked by jim
  1. 9 find k. k=4kg/29cm

    distance=4/29 * 9 I am very disturbed by the questions statement that kilograms is weight. It is not weight, it is mass.
    10 y=k/x put in x,y and solve for k.

    11 time=cook/rate=3/(9/8hr)

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    Hooke's Law. The distance d when a spring is stretched by a hanging object varies directly as the weight w of the object. If the distance is 64cm when the weight is 3kg, what is the distance when the wight is 9kg?

    asked by Vance Reed on July 28, 2010
  2. algebra

    hooke's law the distance d when a spring is stretched by a hanging object. if the distance is 14cm when the weight is 4kg what is the distance when the weight is 9kg The distance is

    asked by karon on December 15, 2011
  3. algebra

    Hooke.s Law. The distance d when a spring is streched by a hanging object varies directly as the weight w of the object. If the distance is 66 cm when the weight is 3 Kg., what is the distance when the weight is 7 Kg.

    asked by plz hlp on June 1, 2012
  4. Algebra II

    Hooker's law. The distance d when a spring is stretched by a hanging object varies directly as the weight w of the object. If the distance is 39cm when the weight is 3kg, what is the distance when the weight is 9kg? Thank you,

    asked by Esther on March 16, 2011
  5. intro to algebra

    Hookes law states that the distance that a spring is stretched by hanging object varies directly as the mass of the object. If the distance is 20 cm when the mass is 3kg, what is the distance when the mass is 5 kg?

    asked by Anonymous on July 3, 2017
  6. algebra

    Hooke's law states that the distance an object is stretched varied directly with the force exerted on the object. Suppose the force exerted by 7-kg mass stretches a certain spring 5 cm. To the nearest 0.1 cm. how far will the

    asked by Isaiah on October 18, 2012
  7. math

    Hooke's law states that the distance an object is stretched varied directly with the force exerted on the object. Suppose the force exerted by 7-kg mass stretches a certain spring 5 cm. To the nearest 0.1 cm. how far will the

    asked by Isaiah on October 18, 2012
  8. 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

    asked by Rizza Mae on November 9, 2016
  9. algebra

    The distance d when a spring is stretched by a hanging object varies directly as the weight w of the object. If the distance is 58cm when the weight is 3kg, what is the distance when the weight is 8kg

    asked by lisa on November 17, 2011
  10. science(physics)

    a object potential energy is described as 1/2kx^2. what does k and x represent? thanks. This is the PE in a stretched spring. k is the spring constant, x is the distance the spring is stretched (or compressed). Read up on Hookes'

    asked by john on June 13, 2007

More Similar Questions