Posted by **Anonymous** on Sunday, June 29, 2014 at 8:57am.

if the helicopter is moving forward at 30 mph and drops 400 feet in the elevation while the vehicle is moving 48 mph, how does the angle of depression change after 10 minutes?

- pre-cal - incomplete -
**Steve**, Sunday, June 29, 2014 at 1:00pm
So the helicopter drops 400 feet. How high was it when it started its descent?

what is "the vehicle"? Is it a car driving directly underneath the chopper?

Did we start at t=0 when the chopper was directly above "the vehicle"?

Which angle of depression? chopper-to-ground? chopper-to-fixed point on ground? chopper-to-moving "vehicle"?

Woefully incomplete conditions!

- pre-cal -
**Steve**, Sunday, June 29, 2014 at 4:45pm
However, assuming the chopper starts at (0,h) and the vehicle starts at (0,0),

after t minutes the chopper and vehicle are at

(2640t,h - 5/33 t) and

(4224t,0)

So, the line between them has slope

(h-5/33 t)/(1584t)

Now you have the angle

tanθ = (h-5/33 t)/(1584t)

so you can figure dθ/dt at t=10.

## Answer This Question

## Related Questions

- pre algebra - Two bank robbers flee at 60 mph. 26 minutes later, a police ...
- Pre-Cal - Two airplanes take off from an airport at the same time. One travels ...
- Physics - If our planet is travelling at 10000 mph (just using hypothetical ...
- Geometry (Law of Cosine or Sine) - two cars start moving from the same location ...
- physics - The Cedar Bluff express KAT bus averages 15 mph for 20 minutes, and ...
- physics - The Cedar Bluff express KAT bus averages 5 mph for 17 minutes, and ...
- Pre Calc - visually show on compass/vector graph n 60 degrees w at 400 mph, n 40...
- physics - On the once popular show “Knight Rider,” the tricked-out car (for the ...
- math - A scuba diver dove from the surface of the ocean to an elevation of -79 9...
- physics - If a car moving at 76.0 mph takes 500 ft to stop with uniform ...

More Related Questions