Posted by Sarah on Thursday, June 4, 2009 at 11:27am.
It'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?
So it would be 35 +22 = 57
and 35-22 = 13 ???
Good, the answers are correct!
(if they refer to questions (a) and (b) respectively)
that seemed to easy for physics ???
Physics 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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