Saturday

April 18, 2015

April 18, 2015

Posted by **ryan** on Sunday, November 11, 2012 at 4:49pm.

After how many second will the diver hit the water?

If the water were drained from the pool, and I launched a ball from the platform at the same initial velocity, when would the ball hit the bottom of the pool?

- math -
**Reiny**, Sunday, November 11, 2012 at 6:17pmYou must have seen the general equation for this type of question

in your case you have

height = -4.9t^2 + 3.2t + 5

d(height)/dt = -9.8t + 3.2

= 0 for a max of height

9.8t = 3.2

t = 32/98 = 16/49 seconds

at that time,

height = -4.9(16/49)^2 + 3.2(16/49) + 5

= 5.52 m

For the second part, we would have to know how deep the pool is.

When they speak of a 10m pool, like in the Olympics, they do not refer to the depth of the pool, but rather the height of the tower for diving.

It does not mean that the pool is 10 m deep!

If the question was erroneously meant as such, then solve

-4.9t^2 + 3.2t + 15 = 0

**Answer this Question**

**Related Questions**

DIFF CALCULUS - A swimming pool is 12 meters long, 6 meters wide, 1 meter deep ...

CALCULUS - Hi guys can you help me! Please teach me step by step.. I really need...

Algebra-Quadratic Applications - A diver on a platform 40 feet in height jumps ...

physics - A diver is jumping straight up with 2 m/s from a 15 meter platform. ...

Math - The highest dive in the Olympic Games is from a 10-meter platform. The ...

Math - I don't get either of these equations. Please help me out! 1. Music Mart ...

algebra - an object is launched vertically in the air at 29.4 meters per second ...

algebra - an object is launched vertically in the air at 29.4 meters per second ...

physics - divers compete by diving into a 3.0m deep pool from a platform 10m ...

Math - The path of a cliff diver as he dives into a lake is given by the ...