Wednesday

August 27, 2014

August 27, 2014

Posted by **chris** on Monday, December 8, 2008 at 4:10pm.

- calculus helpppp! -
**bobpursley**, Monday, December 8, 2008 at 4:40pmUsing Pythagorean theorm,

length^2=b^2+ h^2

where b is the base length, and h is the height.

Taking the derivative..

0=2b db/dt + 2h dh/dt

you are given db/dt, solve for dh/dt

For the second part, you will have to find b and h at 30 sec. b will be .40*30, solve for h, and again, you have it.

**Related Questions**

Calculus - Suppose a ladder of length 36 feet rests against a wall, and we pull ...

Calculus - a 5m ladder rests against a vertical wall. The top of the ladder ...

Physics - A 77 kg window cleaner uses a 13 kg ladder that is 7.1 m long. He ...

College Physics - A 75.0 kg ladder that is 3.00 m in length is placed against a ...

Physics - A ladder of mass M and length 2 m rests against a frictionless wall at...

physics - An 9.0 m, 210 N uniform ladder rests against a smooth wall. The ...

Physics - A ladder, 5.0 m long, leans against a frictionless wall at a point 4.0...

please help asap! - A ladder, 5.0 m long, leans against a frictionless wall at a...

physics - A ladder can fall for two reasons. If it is set too steep and the ...

AP Physics - A ladder of unknown length and mass of 29 kg rests on a rough floor...