Posted by **Nikki** on Sunday, September 12, 2010 at 2:23pm.

(Another related rate question)

A plane (alt. 4000ft) is flying west at 700ft/sec. A searchlight under its path, tracks it. How fast if the light pivoting when the plane is 1000ft east?

---

Kind of similar to the lamp post question I posted earlier. I know dp/dt, 700ft/sec. We're looking for the rate of the light, dl/dt. 4000ft is a constant. I also think p would be -1000ft, but I'm not quite sure.

Again, I'm not quite sure about the equation. I do know, based on my picture, that there will be trig functions involved, based on the angle of the searchlight moving to track the plane. Help again?

Thanks!

## Answer This Question

## Related Questions

- calculus - A plane is flying west at 500 ft/sec at an altitude of 4000 ft. The ...
- Math (Ms. Sue Please help!) - A plane on a search mission flew east from an ...
- Anyone Please Help! - A plane on a search mission flew east from an airport, ...
- Math - A plane on a search mission flew east from an airport, turned, and flew ...
- Please Anyone!!! - Plane A is 40 mi south and 100 mi east of Plane B. Plane A is...
- Math - Plane A is 40 mi south and 100 mi east of Plane B. Plane A is flying 2 ...
- Algebra 2 - 1. Plane A is 40 mi south and 100 mi east of Plane B. Plane A is ...
- Calculusss ( pleassee someboddy heelp ) - an airplane flying due east at 400 ...
- Honors Trig. - A plane is flying at a speed and direction of 550 mph, 25 degrees...
- algebra 2 - plane a is 40 mi south and 100 mi east of plane b. plane a is flying...

More Related Questions