Simple boat and river question(Vectors)

  • Thread starter Thread starter dmitrip
  • Start date Start date
  • Tags Tags
    Boat River
AI Thread Summary
To row directly across a river while accounting for the current, Pierre must adjust his heading angle. Given his rowing speed of 10 km/h and the river's current of 6 km/h, he should calculate the angle using vector addition. The equation Vbg = Vbw + Vwg helps determine the necessary angle relative to the shore. By solving this, Pierre can ensure he reaches the opposite bank without being swept downstream. Understanding these vector components is crucial for successful navigation across the river.
dmitrip
Messages
7
Reaction score
0

Homework Statement



In his rowboat, Pierre heads directly across a river at a speed of 10 km/h. The river is 120m wide and is flowing at 6 km/h.

Suppose Pierre wants to row directly across the river. At what angle relative to the shore should he head?

I would really appreciate help with this question, since I know that it is suppose to be straight forward and for some reason I just can't solve it! must be because I didn't have much of a sleep.

thanks alot
 
Physics news on Phys.org
Vbg = Vbw + Vwg
where Vbg is the velocity of the boat relative to the ground, Vbw is the velocity of boat relative to water, Vwg is the veloctiy of the water relative to the ground.
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanged mass'

Thread 'A cylinder connected to a hanged mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Stuck on a vector problem: Boating across a river
Replies
11
Views
3K
River question (looking for angles and headings)
Replies
8
Views
2K
How Are Velocity and Angle Calculated When Crossing a River?
Replies
3
Views
1K
Simple Vector Boat Problem, Conceptual Misunderstanding
Replies
2
Views
2K
Vectors Question using Calculus -- Swimmer crossing a River
Replies
30
Views
4K
Calculate River Width: Boat Width Problem
Replies
8
Views
10K
River-boat problem (Relative velocity)
Replies
9
Views
6K
River Boat Question That's Throwing Me Off
Replies
1
Views
3K
Adding Vectors to Find Velocity
Replies
16
Views
3K
Velocity Vectors and Navigation Across A River
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top