- #1
brad sue
- 281
- 0
Hi this problem confuses me :
A sailor wants to travels due east at a velocity of 15km/h with respect to a coordinate system fixed to the ground.
The sailor must contend with the gulf stream, which moves north at 5 km/h. With which veolcity with respect to the water should the sailboat proceed under sail?
to try solve it I set :
Vbg= velocity of boat relative to ground.
Vwg= velocity of water relative to ground.
Vbw= velocity of boat relative to water.
now I wrote: Vbg= Vbw+Vwg but For me it does not fit.
What would fit is :
Vbw= Vbg+Vgw
here Vgw is not defined in the problem!
please can someone can help me?
Also, to find the angle θ of the boat, I am confused about what ( and where)put in the equation θ =tan-1(y/x)
Thank you
brad
A sailor wants to travels due east at a velocity of 15km/h with respect to a coordinate system fixed to the ground.
The sailor must contend with the gulf stream, which moves north at 5 km/h. With which veolcity with respect to the water should the sailboat proceed under sail?
to try solve it I set :
Vbg= velocity of boat relative to ground.
Vwg= velocity of water relative to ground.
Vbw= velocity of boat relative to water.
now I wrote: Vbg= Vbw+Vwg but For me it does not fit.
What would fit is :
Vbw= Vbg+Vgw
here Vgw is not defined in the problem!
please can someone can help me?
Also, to find the angle θ of the boat, I am confused about what ( and where)put in the equation θ =tan-1(y/x)
Thank you
brad