Sunday

March 29, 2015

March 29, 2015

Posted by **Tii** on Thursday, October 7, 2010 at 6:08pm.

"The pilot of a plane is flying at 450 mi/hr W 20.0 degrees S relative to the earth. She sees another plane flying at 350 mi/hr N 40.0 degrees W relative to her plane. What was the magnitude and direction of the plane she saw relative to the earth?"

I'm not entirely sure where to start because relative motion is something I'm still trying to grasp. What do I start with to find the magnitude?

- Physics -
**drwls**, Thursday, October 7, 2010 at 7:14pmVelocity of the other plane with respect to Earth =

Velocity of the other plane w.r.t. her plane

+ Velocity of her plane w.r.t. Earth

Perform the vector addition

- Physics -
**Thuy**, Thursday, October 7, 2010 at 7:38pmThat doesn't require me to find the x and y components of those vectors, does it?

- Physics -
**drwls**, Thursday, October 7, 2010 at 7:44pmYes it does. It's not hard.

Call North the +y direction and east the +x direction.

It is not clear to me if "W 20.0 degrees S" means "20 degrees west of south" or "20 degrees south of west". You will need to clarify the terminology to answer the question.

- Physics -
**Thuy**, Thursday, October 7, 2010 at 7:46pmSo, would the components look something like this:

450cos200

450sin200

350cos130

350sin130

**Answer this Question**

**Related Questions**

Pre cal - 1. An airplane flies 200 km on course 110 degrees from point A to ...

Physics - A light plane is flying at 25 degrees east of due magnetic north, ...

Physics - A pilot must fly his plane to a town which is 200 km from his starting...

Honors Trig. - A plane is flying at a speed and direction of 550 mph, 25 degrees...

Geometry- trig ratio - An observer (o) spots a plane flying at a 55 degrees ...

advance geometry - A plane is flying east, ascending at a constant angle. Jack ...

geometry - the pilot of a plane flying 2000 meters above sea level observes two ...

physics - a plane needs to fly at 40 degrees n of e when flying through a wind ...

physics - a jet plane flying at 550 m/s makes a curve. The radius of the circle ...

Physics - A plane is capable of flying 200 km/h. There is a wind of 90 km/h from...