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October 20, 2014

October 20, 2014

Posted by **Anonymous** on Sunday, March 2, 2008 at 10:41am.

a) Find the component of the boat's velocity perpendicular to the bank.

b) Find the downstream component of the velocity contributed by the boat's engines.

c) Find the total downstream component of the boat's velocity.

- Physics -
**drwls**, Sunday, March 2, 2008 at 11:41ama) (velocity component across)=

(river width)/crossing time)= 2.0 km/hr

b) If the boat's speed with respect to water is 2.5 km/h and the component across the river is 2.0 km/h, the downstream component must be 1.5 km/h (Consider the Pythagorean theorem).

c) Since it travels at a 60 degree angle to the perpendicular to the shore, the total velocity realtive to land is 2.0/cos 60 = 4.0 km/h and the total downstream velocity is 4.0 sin 60 = 3.464 km/h

1.964 km/h of that is the flow velcoity of the river

- Physics -
**Shauniechulo**, Sunday, March 2, 2008 at 10:48pmSo this is someone from Pryce's class haha. who asked this?

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