Question
A 20m long ladder is leaning against a wall. The top of the ladder is sliding down the wall at a constant speed of 2m/s. How quickly is the bottom of the ladder moving away from the wall when the bottom of the ladder is 5m from the wall? Give your answer as an exact expression.
Answers
If the top of the ladder is at height y, then
x^2+y^2=400
when x=5, y=5√15
x dx/dt + y dy/dt = 0
Now just plug in your numbers.
x^2+y^2=400
when x=5, y=5√15
x dx/dt + y dy/dt = 0
Now just plug in your numbers.
Related Questions
related rates:
a ladder, 12 feet long, is leaning against a wall. if the foot of the ladder slides...
A ladder 25ft long is leaning against the wall of a house. The ladder is pulled away from the wall a...
A ladder is leaning up against a wall. The ladder touched the wall 5ft up. The ladder is 6ft Long....
A uniform ladder 5 m long weighing 200 N
friction between the bottom of the ladder and the
its...