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Help! Related Rates problems.

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luffy27's picture
Joined: Nov 2008
Help! Related Rates problems.

hey, ive recently discovered that related rates is my weakest topic in calculus:confused:. i was hoping i could get some help with a few problems.

1) A ladder 25 feet long leans against a vertical building. If the bottom of the ladder slides away from the building horizontally at a rate of 15 ft/sec, at what rate is the angle between the ladder and the ground changing when the top of the ladder is 7 feet above the ground?


2) A missile is fired vertically from a point that is 5 miles from a tracking station and at the same elevation as the tracking station. For the first 20 seconds of flight, the missile's angle of elevation (theta) changes at a constant rate of 2 degrees per second. Find the velocity of the missile when the angle of elevation is 30 degrees.

Any and all help is greatly appreciated. Thanks in advance.

Ferris Bueller's picture
Joined: Mar 2008

if i start working on it now, will it still help you?

all in all, it's just another brick in the wall...

I took: AP US Hist, AP Stats, AP Chem
I am taking: AP Calc, AP English, AP Phsics

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