Ofcourse, there is always the race to the nearest washroom midway through the day: Paul and Robbie decide to have a race. The sign indicates the washrooms are 200 m away. if Paul runs 3.0 m/s and Robbie at 3.5 m/s, How much time does the winner wait for the other person at the washroom?
2007-02-11 01:34:26 · 6 answers · asked by avant1991 3 in Science & Mathematics ➔ Physics
and pls show me the steps so i understand!
2007-02-11 01:42:11 · update #1
d= 200 m
v(paul)= 3 m/s
v(robbie)=3.5 m/s
t(paul)= d / v(paul) = 200 / 3 = 66.66
t(robbie)= d / v(robbie) = 200 / 3.5 = 57.14
t(wait) = t(paul) - t(robbie) = 9.52 sec
Also, I dont know how old you are, but if you're over 14 or 15 you should pick up a book and learn how to do this.
2007-02-11 01:47:55 · answer #1 · answered by Rick 1 · 0⤊ 0⤋
Paul will run to the washroom in (200/3) seconds = 66.67s.
Robbie will run to the washroom in (200/2.5) seconds = 80s.
Paul the winner will need to wait 80-66.67= 13.33seconds
2007-02-11 09:44:18 · answer #2 · answered by The exclamation mark 6 · 0⤊ 1⤋
Divide 200 by 3; and 200 by 3.5. What is the difference?
2007-02-11 10:00:15 · answer #3 · answered by CLICKHEREx 5 · 0⤊ 0⤋
Total distance is 200m
One takes 3m/s to reach the washroom
but Time=Distance/Speed
therefore Time=200/3=66.7sec
while the other takes 3.5m/s
so this is Time=200/3.4=57.1sec
to find now the difference in time we are going to subtract the time who gets there early from the one who gets there let
so here we go
66.7-57.1=9.6sec
So the one who gets there earlier will wait for 9.6second
2007-02-11 10:06:04 · answer #4 · answered by LUNTHA K 1 · 0⤊ 0⤋
well, if there is someone in the washroom the winner has to wait until that person leaves, if the washroom is free the winner can just use it. however, the LOSER has to wait as long as the winner needs to have hers or his biological needs
2007-02-11 09:44:07 · answer #5 · answered by Good Advice 2 · 1⤊ 0⤋
consider what you want to measure.. time
now look at your given data.. 200m, 3.0m/s, 3.5m/s
if you just look at the UNITS.. and remember that when you divide by a fraction it is the same as inverting that fraction and multiplying... m / (m/s) = m * (s/m) = ms/m = s which is TIME that you are looking for.
so now do the same thing with the numbers 200m/(3.0m/s) will give you the time it takes the slower boy to run 200 meters and then 200m / (3.5m/s) will give you the time it takes the faster boy to run 200m.. then just find the difference in the times.
2007-02-11 09:47:44 · answer #6 · answered by ♥Tom♥ 6 · 0⤊ 0⤋