This preview shows page 1. Sign up to view the full content.
Unformatted text preview: ing subscripts required by Galilean velocity formula. We are given velocity of train with respect to ground and velocity of raindrop with respect to ground. 4. vtg=
10 km/hr i and vrg=
20 km/hr j Given velocity vector of raindrop with respect to train vrt in both component form and (magnitude,direcOon) notaOon Galileo stated that vrg=vrt+vtg, and we want vrt. So vrt= vrg
vtg=
20j
(
10i) = 10i
20j km/hr (component notaOon), and magnitude of vrt is (100+400)0.5 =(22.4 km/hr) and direcOon is tan
1(20/10)=
63 deg with respect to x
direcOon Quiz Week 6
Problem 2
Soln • A jet is traveling due east, and it has an airspeed of 400 km/hr (=vjw). A strong wind is also blowing due east (so you have direcOon, but not magnitude of vwg. Suppose it takes 1 hr to travel between 2 ciOes when traveling east, but 3 hrs to travel between the same ciOes when traveling west against the same wind. What is the speed of the wind (with respect to ground)? 1. Use •
• 2.
3. 1.
2.
3. frame A = ground symbol= g frame B = wind symbol= w Object P = jet symbol= j Write given...
View Full
Document
 Fall '11
 whiteson

Click to edit the document details