destinypierre
29.10.2019 •
Physics
Abuilding that is 245 feet tall casts a shadow of various lengths x as the day goes by. an angle of elevation θ is formed by lines from the top and bottom of the building to the tip of the shadow. 245 ftθx find the rate of change (in radians per foot) of the angle of elevation dθ dx when x = 300 feet. (round your answer to five decimal places.)
Solved
Show answers
More tips
- S Sport How to Learn to Pull Up on Monkey Bars?...
- L Leisure and Entertainment Scrapbooking: What is it and Why is it Becoming More Popular?...
- H Horoscopes, Magic, Divination How to Cast a Love Spell on a Guy? Guide for Guys...
- F Family and Home How to Sew Curtain Tapes: Best Tips from Professionals...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
- F Food and Cooking The Disease That Haunted Abraham Lincoln...
- C Computers and Internet How to Get Rid of Windows Genuine Check?...
- H Health and Medicine How to perform artificial respiration?...
- S Style and Beauty Tricks and Tips: How to Get Rid of Freckles...
Answers on questions: Physics
- P Physics Can anyone help w this?...
- M Mathematics Why do 5.0.2 and 20% have the same value? Be specific and show your work....
- M Medicine Is there a diet where you only meat you eat is chicken...
- B Business Can you define a standard for judging whether a given distribution of income is sufficiently unfair to justify government redress?...
- A Arts what are your plans for Halloween? what do you plan to dress up as? what are you going to do? if you do not celebrate Halloween waht do you usually do on that day? please...
Ответ:
Explanation:
It is given that,
Height of the building, h = 245 ft
The base of the building and shadow is x.
Let is the angle of elevation that is formed by lines from the top and bottom of the building to the tip of the shadow. Using the trigonometric ratio as :
When x = 300 feet
So, the rate of change of the angle of elevation is -0.001633 rad/ft. Hence, this is the required solution.
Ответ:
The angle of elevation decreases as the length of the shadow which forms the angle increases
The rate of change of the angle of elevation, when x = 300 feet, is approximately -0.00163 radians per foot
Reasons:
Given parameter;
Height of the building = 245 ft.
Lengths of the shadow cast by the building = x
Angle of elevation of the top of the building to the tip of the shadow = θ
Required:
The rate of change of the angle of elevation, , when, x = 300 feet
Solution:
Using chain rule of differentiation, we get;
Therefore;
When x = 300 feet, we get;
Therefore, when x = 300 feet, ≈ -0.00163 radians/ft.
Learn more here:
link
Ответ:
Explanation:
v = ω R
v is linear speed and ω is angular speed
ω = v / R
a ) Inner radius = 25 x 10⁻³ m
speed v = 1.25 m/s
ω = 1.25 / (25 x 10⁻³ )
= .05 x 10⁻³
= 5 x 10⁻⁵ rad / s
outer radius = 58 x 10⁻³ m
speed v = 1.25 m/s
ω = 1.25 / (58 x 10⁻³ )
= .0215 x 10⁻³
= 2.15 x 10⁻⁵ rad / s
b )
linear constant speed v = 1.25 m /s
time = 74 min = 74 x 60 s
distance tracked = speed x time
= 1.25 x 74 x 60
= 5550 m
c ) time given
= 74 min = 74 x 60 s
angular acceleration
= ( 2.15 - 5 ) x 10⁻⁵ / (74 x 60 )
= - 6.42 x 10⁻⁹ rad / s²