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During a heavy rain, the drops are falling at a constant velocity and at an angle of 10.1° west of the vertical. |dw:1378841565636:dw| You are walking in the rain and notice that only the top surfaces of your clothes are getting wet. What is your walking speed if the speed of the drops relative to the ground is 4.6 m/s? hmm
assuming spherical chickens in a vacuum ...
walking speed is less then 5? I'ma bit confused as to how to figure that out
i dont know of any speed you can walk and only get your top wet
oh okay.. so where do we go from here to find the walking speed?
id say that if a single drop is falling, and it hit you on the top, then you have to be standing still relative to the drop ... or same speed as the drop is moving
so the speed would either be 0m/s or 4.6 m/s ?
if your speed is 0, then the angle of the drops would hit your "back" you have to be going as fast as the drop in order for it to hit you on the top
if you move any faster you are running into drops and hitting on the front, any slower and your getting hit in the back ...
so you have to be standing still right? in order for the drop to land directly on top of you
you have to be still relative to the drop, not to the ground
oh okay.. so that would leave your speed at 0???
you have to be moving the same speed as the drops, and the drops are moving at 4.2 i think it was?
it was 4.6, so my speed would be 4.6??? hah
that would be optimal ... assuming spherical chickens and all :)
4.6 m/s was wrong though.... did you count the angel of 10.1 degrees?
the angle is irrelevant ... a drop is moving 4.6 with respect to the ground due to the angle
if the drops is just falling straight down, then its moving 0 wrt the ground and if you stand still its just falling on top of you
okay... understanding so far.. but if the drops are moving with respect tot he ground at 4.6 m/s what would be my speed?
if its just hitting you on top, then you have to be standing underneath it; and that would only occur if you are moving at the same speed; any faster and you run into it, any slower and it runs into you
my best guess is you are moving 4.6 as well .... but you say its wrong :)
maybe its my interpretation of the ground speed
it's online homework, and it shows 4.6 being wrong...
isit falling at a rate of 4.6? or is it covering a length of 4.6
try the 4.6 as a down speed instead of an across speed, then its a trig
.819 m/s maybe?
that was correct. So it was just using trig then...
Thank you so much, I guess we both overthought the problem haha.!
ground speed was misleading, then ...
there was one more problem i was stuck on, could you help me with it? @amistre64