Hi, I have some answers to the following questions but I would just like to know if Im understanding the concepts correctly.
A firefighter climbs up a 100 m ladder leaning against a verticle wall. The ladder makes an angle of 25 degrees with the wal. The firefighter reaches th eroof in 15 seconds.
(a) what is the height of the wall?
(b) how far is the base of the ladder from the wall?
(c) what is the firefighters average verticle velocity?
Pythagorean Theorum - (a^2) + (b^2) = c^2
velocity (v) = distance/time
The Attempt at a Solution
(a) COS = adjacent/hypotenuse
Cos25 degrees = X/10 m
0.91 = x/10m
X= 9.06 m
(b) a^2 +b^2 = c^2
a^2 + (9.06)^2 = 10^2
a^2 +82.08 = 100
a^2 = 17.92
a= 4.2 m
(c) given distance up ladder = 10 m
time = 15.0 seconds
Analysis: velocity = distance/time =10m/15s = 0.666 m/s
what is the difference between average verticle velocity and resultant velocity???
THanks for the help