Home » Ask & Discuss » Physics. » Mechanics « Back to Discussion

Mechanics

New kid on the Block

Joined:	3 Jan 2012
Post:	9

4 Feb 2012 13:58:55 IST

0 People liked this

150

numerical

Physics , Mechanics , Kinematics , NewtonsLawsCirMotion , Work Power Energy collisions , Rotation , Gravitation , Simple Harmonic Motion , Fluid Mechanics , Materials Wave Sound , Super Position , units dimensions , com momentum , shm , wave sound

an airplane has a speed of 600km/hr with respect to air. it has to fly a distance of 800km northward.in what direction should it fly if a steady wind is blowing at a speed of 120km/hr from the west?what will be its speed with respect to the ground be?draw the relative diagram of calculations.

Share this article on:

Comments (1)

Arjun Virmani

Forum Expert

Joined: 1 Jun 2009

Posts: 1294

4 Feb 2012 16:10:03 IST

Like 0 people liked this

Note : All the BOLD letters are vectors.

As we have to go north, we'd like to apply all our strength towards N.

i is a unit vector towards E (from W) and j is unit vector towards N.

Let speed of plane w.r.t. ground be u

Speed of wind ( say w) = 120 i.

Speed of Plane w.r.t. air (say s) = u - w = 600 j.

Then, u = s + w

u = 600 j + 120 i.............!!!!!

ans!!!

Quick Reply

Reply

	Some HTML allowed.
	Keep your comments above the belt or risk having them deleted.
	Signup for a avatar to have your pictures show up by your comment
	If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team