Homework Help: College Physics

Posted by Dumb-Dumb on Wednesday, September 12, 2012 at 3:58pm.

A hunter wishes to cross a river that is 1.6 km wide and flows with a speed of 5.0 km/h parallel to its banks. The hunter uses a small powerboat that moves at a maximum speed of 15 km/h with respect to the water. What is the minimum time necessary for crossing?
min

College Physics - Steve, Wednesday, September 12, 2012 at 4:45pm
depends on whether he cares how far downstream the boat drifts. Minimum time is achieved by heading perpendicular to the bank. In that case, he has to go 1.6km at a speed of 15km/hr.

min time is thus 1.6km / 15 km/hr = .10666 hr = 6.4min

Answer this Question

Related Questions

physics - A hunter wishes to cross a river that is 2.5 km wide and that flows ...
Physics - A hunter wishes to cross a river that is 1.6 km wide and that flows ...
physics - A hunter wishes to cross a river that is 2.0 km wide and that flows ...
physics - A hunter wishes to cross a river that is 1.1 km wide and flows with a ...
physics - A hunter wishes to cross a river that is 1.1 km wide and flows with a ...
physics - A hunter wishes to cross a river that is 1.1 km wide and flows with a ...
physics - A boat propelled so as to travel with a speed of 0.50m/s in still ...
Physics - A boat travels at 3.8 m/s and heads straight across a river 240m wide ...
Physics - A boat travels at 3.8 m/s and heads straight across a river 240m wide ...
Physics - A boat travels at 3.8 m/s and heads straight across a river 240m wide ...

For Further Reading

First Name:
School Subject:
Answer: