1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
VikaD [51]
3 years ago
9

William and Stephanie are playing a rather dangerous game of catch on the rooftops of skyscrapers in downtown Chicago. William i

s preparing to throw a tennis ball off the roof of the John Hancock Center, 1130 feet above street level. Stephanie is waiting to catch the ball on the rooftop of the neighboring Water Tower Place, 830 feet above street level. William throws the ball, which leaves his hand with an upward velocity of 46 feet per second, and travels in a parabolic path. Stephanie catches the ball exactly 6.0 seconds after it is thrown. Create a quadratic function describing the height of the ball above the street level with respect to time.
Mathematics
1 answer:
olasank [31]3 years ago
7 0
The question involves the concept & equations associated with projectile motion.

Given:
y₁ = 1130 ft
v₁ = +46 ft/s (note positive sign indicates upwards direction)
t = 6.0 s
g = acceleration due to gravity (assumed constant for simplicity) = -32.2 ft/s²


Of the possible equations of motion, the one we'll find useful is:

y₂ = y₁ + v₁t + 1/2gt²

We can just plug and chug to define the equation of motion:

<u><em>y = (1130 ft) + (46 ft/s)t + 1/2(-32.2 ft/s²)t²</em></u>


<em>(note: if you were to calculate y using t = 6.0 s, you'd find that y = 826.4 ft, instead of 830 ft exactly because of some rounding of g and/or the initial velocity)</em>

You might be interested in
A diver descends to a location of −5014 meters relative to the surface of the water. He then descends another 1012 meters.
Nataly_w [17]
Its -60 3/4


Hope this helps!~
5 0
3 years ago
Read 2 more answers
Show that p must be directed through centroids of cross sections if axial stress ? is not to vary over a cross section.
wolverine [178]
Assuming P (usually written in upper case) represents a force normal to a given cross section.

If a point load is applied to any point of the section, stress concentration will cause axial stress to vary.

The context of the question considers the uniformity of axial stress at a certain distance away from the point of application (thus stress concentration can be neglected).

If a force P is applied through the centroid, sections will be stressed uniformly.  However, if the force P is applied at a distance "e" from the centroid, the equivalent load on the section equals an axial force and a moment Pe.  The latter causes bending of the member, causing non-uniform stress.

If we assume A=(uniform) cross sectional area, and I=moment of inertia of the section, then stress varies with the distance y from the centroid equal to
stress=sigma=P/A + My/I
where P=axial force, M=moment = Pe.
Therefore when e>0, the stress varies across the section.
7 0
2 years ago
Answer ASAP for brainlest
Gemiola [76]

Answer:

none

Step-by-step explanation:

p=lw

24, not squared

if your are calculating the perimeter of area, then it would be squared

4 0
2 years ago
Read 2 more answers
Please answer this correctly
Free_Kalibri [48]

Answer:

No, it is much too low

Step-by-step explanation:

If he sold out 2 performances at around 4000 seats, we would expect the estimate to be 8000 at least, which is way higher.

7 0
3 years ago
Read 2 more answers
Penny is planning a trip to egypt. she has mapped out the expected costs of some different components of her trip, and has compi
rjkz [21]

The total amount that Penny has budgeted for her trip to Egypt is £5351.62.

<h3>What is the total amount budgeted for the trip?</h3>

The exchange rate is the rate at which one currency is exchanged for another currency.  The total amount that was budgeted by Penny is the sum of the different compoments that she compiled for the trip.

Cost of international phone card in Egyptian pound = 41.38 x 5.3841 =£222.79

Cost of passport in Egyptian pound = 65 x 5.3841  = £349.97

Total cost =  3,241.77 + £222.79 + 494.25 +  £349.97+ 398.26 £ + 644.48 = £5351.62

To learn more about exchange rate, please check: brainly.com/question/14160520

#SPJ4

5 0
2 years ago
Other questions:
  • doors for the small cabinet are 12.5 inches long. Doors for the large cabinet are 2.5 times as long as the doors from the small
    7·1 answer
  • What is the quotient of x and 8
    13·1 answer
  • Two angles are supplementary. One angle is 107°. What is the measure of the other angle? __________
    6·2 answers
  • (-4+6i) + (-6-2i)<br> How do I solve
    11·2 answers
  • The mailing list of an agency that markets scuba-diving trips to the Florida Keys contains 78% males and 22% females. The agency
    14·1 answer
  • In a class of 15 children, 6 of them speak primarily English at home.
    10·1 answer
  • PLEASE HELPPPPPPP<br> Find the square root of 1+8i so that the real part of your answer is positive
    8·1 answer
  • Find the sum using the formulas for the sums of powers of integers ( problem attached )
    11·1 answer
  • Please,look at this one.
    14·1 answer
  • HELP GUYS REMEMBER INEQUALITY NEEDED PLEASE READ QUESTION AND HELP IF ITS CORRECT YOU GET BRAINLIEST
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!