I got those answers too. The webpage is how my teacher assigns us homework which is why I am using that. It doesn't like 0.93 s either. I guess I give up. Thanks for your help though.
I tried plugging in the numbers to that formula but I can't seem to get the right answer.
I did it as follows.
89.6m = 42.3 m/s*t + (1/2) 6.33 m/s^2*t^2
First off, was that what you meant?
I tried to solve it using the quadratic forumula but it doesn't seem to be working out.
0=...
Homework Statement
A Boeing 747 "Jumbo Jet" has a length of 59.7 m. The runway on which the plane lands intersects another runway. The width of the intersection is 29.9 m. The plane decelerates through the intersection at a rate of 6.33 m/s2 and clears it with a final speed of 42.3 m/s. How...