Tuesday

January 27, 2015

January 27, 2015

Posted by **lawrence** on Friday, October 7, 2011 at 5:44pm.

- physics -
**Steve**, Saturday, October 8, 2011 at 12:32amPresumably the boat is aimed perpendicular to the parallel banks, but the current carries it downstream.

Just for orientation, let's say the river flows east, and the boat crosses to the north.

In that case, we can draw a diagram involving the relative velocities. The boat's speed is .5 at 90 deg.

The river's speed is .3 at 0 deg

So, the boat's resultant speed is sqrt(.5^2 + .3^2) = .583 at 59.1 deg

At that direction, the distance travelled is 60 sec 30.9 deg = 70m

70m/.583s = 2 minutes

**Answer this Question**

**Related Questions**

Physics - A boat propelled so as to travel with a speed of 0.5m/s in still water...

Physics - Pls sir, kindly send the solution to my email. thanks. 1)A boat ...

Physics - A boater wants to head straight across a river that has a current of ...

Advanced Maths (Vectors) AQA Level - A boat which can travel at 5m/s in still ...

Advanced Maths (Vectors) AQA Level, please help? - A boat which can travel at 5m...

physics - A boat crosses a river, which is 60 meters wide in 15 seconds. Upon ...

physics - A motor boat whose speed is 2.6 m/s in still water, needs to point ...

physics - Trevor can row a boat at 3.00 mi/hr in still water. He needs to cross ...

physics - A boat’s speed in still water is vBW = 1.85 m/s. If the boat is to ...

Physics - A boat’s speed in still water is 1.95m/s . The boat is to travel...