Problemas
Consider a ladder sliding down a wall as in the figure. The variable a is the length of the ladder. The variable h is the height of the ladder's top at time t, and x is the distance from the wall to the ladder's bottom. Suppose that the length of the ladder is 4.6 meters and the top is sliding down the wall at a rate of 0.6m/s Calculate (dx)/(dt) when h=3.3 (Use decimal notation. Give your answer to three decimal places.) (dx)/(dt)vert _(vert xvert 5)approx square _(x,8)
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Veronica
maestro · Tutor durante 5 años
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To solve this problem, we will use the **Pythagorean theorem** and related rates. Here's the step-by-step solution:---### Step 1: Relating
,
, and
The ladder forms a right triangle with the wall and the ground. The Pythagorean theorem gives us the relationship:
where:-
is the height of the ladder's top from the ground,-
is the distance of the ladder's bottom from the wall,-
is the length of the ladder (constant).Since the ladder's length is constant (
), we have:
---### Step 2: Differentiate with respect to time
Differentiate both sides of the equation
with respect to
:
Simplify:
Solve for
:
---### Step 3: Substitute known valuesWe are given:-
,-
,-
m/s (negative because the height is decreasing).First, calculate
when
using the Pythagorean theorem:
Now substitute
,
, and
into the formula for
:
---### Final Answer: