Posted by lily on Thursday, February 14, 2013 at 8:28pm.
The formula for the height of a falling object is shown below, where h is the height of the object in meters, t is the time in seconds, and k is the height, in meters, from which the object began its fall.
h = –4.9t² + k
If a rock is dropped from a building that is 150 meters tall, what is the height of the rock 4 seconds after it was dropped?

algebra 1  PsyDAG, Thursday, February 14, 2013 at 8:43pm
h = 4.9(4)^2 + 150 = ?

algebra 1  lily, Friday, February 15, 2013 at 10:25am
is it 145.1

algebra 1  lily, Friday, February 15, 2013 at 10:30am
not it is 71.6 right

algebra 1  PsyDAG, Friday, February 15, 2013 at 6:52pm
Right!

algebra 1  Anonymous, Friday, July 25, 2014 at 10:11am
if an object is dropped from a great height, its speed "v" varies directly with the time "t" it has been falling . a rock dropped over the edge of a canyon is traveling 39.2 m/s after 4 sec.
1. Express v as a function of t.
2. what is the speed of the rock after 9 seconds

algebra 1  Anonymous, Thursday, April 16, 2015 at 9:09pm
Falling Object An object is dropped from a
height of 576 feet. How long does it take for
the object to reach the ground? Assume there
is no air resistance
Answer This Question
Related Questions
 algebra  The formula for the height of a fallinis shown below, where h is the ...
 algebra 2  An object is launched at 19.6 meters per second from a 58.8 meter ...
 Algebra  An object is fired vertically upward with an initial speed of 68.6 ...
 Algebra  An object is fired vertically upward with an initial speed of 68.6 ...
 Algebra  An object is fired vertically upward with an initial speed of 68.6 ...
 Algebra  An object is fired vertically upward with an initial speed of 68.6 ...
 Algebra  An object is fired vertically upward with an initial speed of 68.6 ...
 Algebra  I am reposting to correct a mistake. I forgot to add a decimal point. ...
 MATH  An object is fired vertically upward with an initial speed of 68.6 ...
 ALGEBRA  A catapult launches a boulder with an upward velocity of 92 m/s. The ...
More Related Questions