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April 1, 2015

April 1, 2015

Posted by **Sarah** on Thursday, June 4, 2009 at 11:27am.

Can some one show me how to start this ?

- Physics -
**MathMate**, Thursday, June 4, 2009 at 11:34amIt's the same situation as a boat in a river. If the river flows at 2 mph, and the boat moves at 3 mph in the direction of the flow of water, then the boat is moving 3 mph

**faster**than the water. For an observer on the shore, the boat moves at 3+2 = 5 mph. downstream.

Inversely, if the boat moves against the water, the observer will see that the boat moves at 3-2=1 mph upstream.

Can you give it a try now?

- Physics -
**Sarah**, Thursday, June 4, 2009 at 11:43amSo it would be 35 +22 = 57

and 35-22 = 13 ???

- Physics -
**MathMate**, Thursday, June 4, 2009 at 11:53amGood, the answers are correct!

(if they refer to questions (a) and (b) respectively)

- Physics -
**Sarah**, Thursday, June 4, 2009 at 11:59amthat seemed to easy for physics ???

- Physics -
**MathMate**, Thursday, June 4, 2009 at 12:13pmPhysics is not difficult at all as long as you make sure you understand how it works, which is what you have done.

Continue the good work!

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