the height is ground level when h=0 therefore you solve for t in the equation:Originally Posted by danielwu
now use the quadratic formula:
can you solve from there?
i have problem in understanding this question. pls help me. thanks alot
solve the indicated equations graphically. assume all data are accurate to two significant digits unless greater accuracy is given.
The height h (in m) of a rocket as a function of time t (in s) of flight is given by h = 15 + 86t - 4.9t^2. Determine when the rocket is at ground level
First have you plotted a graph of the function? It should look like the firstOriginally Posted by danielwu
attachment below. From this you will observe zeros at two points one just
less than zero and the other just less than 18.
Now do new plots about 0, and 18 (the two other attached plots) and read
off the values of t which correspond to h=0 to the required precisions.