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
Wittaler [7]
3 years ago
12

3.A ball is thrown into the air with an initial velocity of 15 m/s. a.How long does it take the ball to reach maximum height?b.W

hat is the maximum height that the ball reaches?c.What is the ball’s velocity at its maximum height?d.How long does it take for the ball to return to its initial height?
Computers and Technology
1 answer:
ehidna [41]3 years ago
3 0

Answer:  a) = 1.5 sec.  b= 11.5 m. c=0  d= 1.5 sec.

Explanation:

a) Once thrown into the air , the only influence on the ball is gravity, so, we can conclude that the acceleration acting on the ball is the one due to gravity, i.e., g= 9.8 m/sec².

Applying the definition of acceleration, we can write the following equation:

a= (vf-vo) / t   ⇒ g = vf-vo / t. (1)

Now, when the ball reaches to his maximum height, it stops momentarily, and then starts to fall, so for this height, we can write vf=0.

Replacing  in (1), and solving for t, we get:

t = (0 -vo) / g = -15 m/s/ - 9.8 m/sec² (Taking upward as positive  direction)

a) t= 1.5 sec.

Replacing this value in the kinematic equation for displacement, when vo=15 m/s, we get:

hmax: 15 m/sec . 1.5 sec -1/2. 9.8 m/sec². (1.5 sec) ² (2)

b) hmax= 11.5 m

c) vf= 0 (as explained above)

Finally, in order to know how long the ball takes to return to its initial height, we know that for the falling part of the trajectory, vo=0, so we can write the equation for displacement as follows:

h=-hmax (because it returns to the same starting point)= 1/2 gt²=-11.5 m

Solving for t, we get:

d) t=1.5 sec.

It can be seen that the time used in going up, it is the same for going down, to travel the same distance.

This result is completely general and applies to any free fall problem.

You might be interested in
1. Isabella is a security support manager for a large enterprise. In a recent meeting, she was asked which of the standard netwo
arsen [322]

Answer:

A. router

Explanation:

Isabella is a security support manager for a large enterprise. In a recent meeting, she was asked which of the standard networking devices already present on the network could be configured to supplement the specific network security hardware devices that were recently purchased. The standard networking device Isabella would recommend is router.

3 0
3 years ago
Which tool can you use to display hardware utilization statistics that tell you about the operation of your computer?
defon

Performance monitor tool can you use to display hardware utilization statistics.

<h3>what is a performance Monitor?</h3>
  • Performance Monitor is a system monitoring program introduced in Windows NT 3.1. It monitors various activities on a computer such as CPU or memory usage.

To learn more about performance monitoring, refer

to brainly.com/question/12960090

#SPJ4

7 0
2 years ago
The Moon appears to be red in color during a total lunar eclipse because of the way light waves pass through Earth’s ___________
Marysya12 [62]

Answer bro must have a mental disorder its like ur thumb HEAT WAVES the  moon becomes red bc of heat waves didnt u say that anyways???

Explanation:

8 0
2 years ago
Read 2 more answers
Using the Caesar cipher, "HELLO" is encrypted to "OLSSV" by applying a shift of 7. The number 7 is considered the __________
Semenov [28]

Answer:

The offset

Explanation:

In the question, we understand that the original text is HELLO and the encrypted text is OLSSV.

It should be noted that O replaced H, L replaced E, S replaced L and V replacement O.

This is made possible by a term refered to as offset.

The offset is used to determine the character that will replace another when it is encrypted.

7 characters after H is O; this is same for every other characters in the text.

8 0
2 years ago
How do I delete my Brainly account?
Triss [41]

Answer:

yeah how? please tell me

Explanation:

5 0
2 years ago
Read 2 more answers
Other questions:
  • What is the legal right granted to all authors and artists that gives them sole ownership and use of their words, software, pict
    9·2 answers
  • The acronym is used to define the process that allows multiple devices to share a single routable ip address.
    6·1 answer
  • Demote the "Arrive and leave at the same time each day." List item, and then promote the "Respect" list item.
    6·1 answer
  • WHICH OF THESE IS A TYPE OF ETHERNET <br> 802.11AC <br> 1000BASET <br> 4G
    7·1 answer
  • Priscilla is providing the junior analysts in her firm with some real-world illustrations to explain some of the recommendations
    12·1 answer
  • ***Help ***Which Paste Command is used to insert a new linked Excel worksheet into a PowerPoint presentation? A. Embed B. Use De
    7·1 answer
  • A(n) ________ operator, such as the greater than or less than symbol, can be used in a query criterion to limits the results pro
    12·2 answers
  • What is first page of website called​
    10·1 answer
  • Name the application used for creating Presentations___
    5·2 answers
  • Why does rating an incorrect answer as 1 star raise its score on brainly?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!