posted by .

an object released from rest will fall 16t^2 feet, t seconds after it is dropped. 2 pebbles are dropped, one after the other, from a cliff that is 64 feet high. the 2nd pebble is released the instant the first pebble has fallen exactly one foot. how far above the ground is the second pebble when the first pebble strikes the ground?

  • math -

    1st pebble falls 1 foot in 1/4 sec
    1st pebble takes 2 seconds to hit

    during 7/4 seconds, second pebble falls 49 feet

    so it is still 11 feet up when the first pebble hits

  • math -

    is there an equation for this?

  • math -

    I don,t know that what I am trying to firgure that oug. I even looked in a math book. Nothing.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Algebra

    This has me stumped The approximate time in seconds, that it takes an object to fall d feet under the influence of gravity is given by mathematical model t=square root d/16. A rock dropped from a cliff hits the ground 6 seconds later. …
  2. math

    the height, in feet, of a free-falling object t seconds after being dropped from an initial height s can be found using h=-16t^2+s. An object is dropped from a helicopter 784 feet above the ground. How long will it take the object …
  3. College Algebre

    Here is the math problem: The height of an object in free fall, or otherwise thrown into the air near the earth's surface, with initial vertical velocity v0 in feet per seconds, and from the initial height h0 in feet, at any given …
  4. math

    galileo showed that objects of different weights fall at the same velocity by dropping 2 objects of different weight form the top of the leaning tower of pisa. a model for the heigh h in feet of an object dropped from an initial h0 …
  5. arithmatics

    On the Moon, a falling object falls just 2.65 feet in the first second after being dropped. Each second it falls 5.3 feet farther than in the previous second. How far would an object fall in the first ten seconds after being dropped?
  6. math

    A stone is dropped from a cliff 344 feet high. after how many seconds will it be 200 feet above the ground?
  7. Algebra

    The height of an object after it is released can be modeled by the function f(t)=-16t^2+vt+s, where t is the n?
  8. math

    The approximate distance,S, in feet that an object falls in t seconds when dropped from a height can be found by using the formula S = 16t^2.In 8 seconds, the object will fall a. 256 feet b. 1,024 feet c. 1,084 feet d. 2,048 feet e. …
  9. Math

    an object is thrown upward from a height of 70 feet. t second after it is released, the object is h=-16t^2+40t+70 feet above the ground. how many seconds does it take until the object hits the ground?
  10. math

    Suppose an object is dropped from a height h0 above the ground. Then its height after t seconds is given by h=−16t^2+h0, where h is measured in feet. If a ball is dropped from 48 feet above the ground, how long does it take to …

More Similar Questions