SOLUTION: I need help on this problem: An object's altitude, in meters, is given by the polynomial h + vt - 9.8t2, where h is the height in meters from which the launch occurs, v is the in

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I need help on this problem: An object's altitude, in meters, is given by the polynomial h + vt - 9.8t2, where h is the height in meters from which the launch occurs, v is the in      Log On


   

Question 335703: I need help on this problem:
An object's altitude, in meters, is given by the polynomial h + vt - 9.8t2, where h is the height in meters from which the launch occurs, v is the initial upward speed in meters per second, and t is the number of seconds for which the rocket is airborne. A pebble is shot upward from the top of a building 190 meters tall. If the initial speed is 40 meters per second, how high above the ground will the pebble be after 2 seconds? Round results to the nearest tenth of a meter.
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


No! No! No!

Unless you are on a different planet than Earth, an object's altitude in meters is given by:



where is initial velocity and is initial height.

Now that you have the correct height function, all you need to do is substitute 190 for , 40 for , and 2 for and then do the arithmetic.

John

My calculator said it, I believe it, that settles it