A 20-ft ladder is leaning against a building. If the bottom of the ladder is pulled away fromthe building at ,how fast is the top of the ladder moving down when the top is 10 ft from3 ft2 s3√/3 ftthe ground? Ans:2 sdydt==

Length of the ladder= 20 ft Speed of the bottom of the ladder=3/2 ft/s

A 20-ft ladder is leaning against a building. If the bottom of the ladder is pulled away from 3 ft the building at how fast is the top of the ladder moving down when the top is 10 ft from 2 s dy the ground? Ans: dt == 3√√/3 ft 2 s

A 20-ft ladder is leaning against a building. If the bottom of the ladder is pulled away from 3 ft the building at how fast is the top of the ladder moving down when the top is 10 ft from 2 s dy the ground? Ans: dt == 3√√/3 ft 2 s

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.

Question

A 20-ft ladder is leaning against a building. If the bottom of the ladder is pulled away from
the building at ,how fast is the top of the ladder moving down when the top is 10 ft from
3 ft
2 s
3√/3 ft
the ground? Ans:
2 s
dy
dt
==

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