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For number 2, I'm not sure if I put my knowns and unknowns in the right places. for X I put- d? v- .8 m/s t? y- d=150 v- 1m/s t-? I tried doing t=v/d and got 150.. so I think I put the values in the wrong places?
Ok, well Amber, at first, what I would find is the time it takes her to go across the stream. Distance = 150m. Speed = 1m/s. Therefor, time = 150 seconds.
Now, as she goes across the river, she is also going with the current downstream. She goes downstream the same amount of time it takes her to cross the stream.
Multiply the velocity of the current by the time to get the distacne she goes downstream.
.8m/s * 150s = 120m.
So, if it takes her 150 seconds to cross the 150m wide stream at 1m/s, then the river's current which has a velocity of .8m/s will sweep her downstream 120m in the same time period.
For number 2, I'm not sure if I put my knowns and unknowns in the right places.
ReplyDeletefor X I put- d? v- .8 m/s t?
y- d=150 v- 1m/s t-?
I tried doing t=v/d and got 150.. so I think I put the values in the wrong places?
This comment has been removed by the author.
ReplyDeleteOk, well Amber, at first, what I would find is the time it takes her to go across the stream.
ReplyDeleteDistance = 150m. Speed = 1m/s.
Therefor, time = 150 seconds.
Now, as she goes across the river, she is also going with the current downstream. She goes downstream the same amount of time it takes her to cross the stream.
Multiply the velocity of the current by the time to get the distacne she goes downstream.
.8m/s * 150s = 120m.
So, if it takes her 150 seconds to cross the 150m wide stream at 1m/s, then the river's current which has a velocity of .8m/s will sweep her downstream 120m in the same time period.
*sorry for any mispelling*
ReplyDeleteThanks Eric!
ReplyDeleteno problem
ReplyDelete