(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A building has an external elevator. The elevator is rising at a constant rate of ##2 \; \text{ms}^{-1}##.

Sarah is stationary, watching the elevator from a point 30m away from the base of the elevator shaft.

Let the angle of elevation of the elevator floor from Sarah's eye level be ##\theta##.

Find the rate at which the angle of elevation is increasing when the elevator floor is 20m above Sarah’s eye level.

2. Relevant equations

3. The attempt at a solution

Am I trying to find ##\frac{d\theta}{dt} = \frac{d\theta}{dh}\times \frac{dh}{dt}##. We know ##\frac{dh}{dt} = 2##. Am I on the right track???

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# Homework Help: Rate of Change Question

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