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
Luba_88 [7]
3 years ago
10

A basketball is dropped from the edge of a cliff at the same time that second basketball is thrown upward from the ground. When

they hit each other, the first basketball (the one dropped) has twice the speed of the second one. At what fraction of the height of the cliff does the collision occur?

Social Studies
1 answer:
pentagon [3]3 years ago
6 0

Answer:

The collision occurs at a height of 1/3 of the total height of cliff.

Explanation:

The situation is represented in the attached figure:

For the stone dropped from top of cliff we have

Initial velocity of drop= 0 m/s.

Now the time at which it attains a velocity of 2v is obtained from first equation of kinematics as

v_{f}=u_{i}+gt\\\\2v=0+gt\\\\\therefore t=\frac{2v}{g}

Thus the distance it covers in this time can be calculated using third equation of kinematics as

v_{f}^{2}=v_{i}^{2}+2gh\\\\(2v)^{2}=2gh_{1}\\\\\therefore h_{1}=\frac{2v^{2}}{g}

For the stone thrown upwards the velocity at collision is give as 'v' thus the velocity at which it is thrown upwards can be calculated by first equation of kinematics as

v=v_{i}-gt\\\\\therefore v_{i}=v+gt\\\\v_{i}=v+g\times \frac{2v}{g}\\\\\therefore v_{i}=3v

The height over which it changes it's velocity from '3v' to 'v' can be again obtained from third equation of kinematics as

v^{2}=(3v)^{2}-2gh_{2}\\\\v^{2}=9v^{2}-2gh_{2}\\\\\therefore h_{2}=\frac{4v^{2}}{g}

\therefore h_{2}=2h_{1}

Thus the collision occurs at at a fraction of 1/3 of height.

You might be interested in
BEST ANSWER GETS BRAINLIEST!!!!!!!!!!!
Juliette [100K]

Answer:

true. hope it helps:).please follow me I'm new here

6 0
3 years ago
Read 2 more answers
When distinctiveness is ________, consensus is ________, and consistency is high, people are likely to make an external attribut
Elan Coil [88]

Answer:

A. high; high

Explanation:

Attribution is a theory that explains people's motivation to attach a cause to a behaviour. External attribution or situational attribution is a type of attribution that suggests individuals attribute the cause of an event to external factors such as the situation surrounding a given entity that brings about a certain response from that entity.

When distinctiveness is high, consensus is high and consistency is high, people tend to attribute the cause of a behavior to external factors-external attribution.

8 0
3 years ago
When did the church begin selling indulgences? what began?
Andreyy89

Answer:

1095

The first known use of plenary indulgences was in 1095 when Pope Urban II remitted all penance of persons who participated in the crusades and who confessed their sins. Later, the indulgences were also offered to those who couldn't go on the Crusades but offered cash contributions to the effort instead.

Explanation:

6 0
3 years ago
Do you believe in global warming​
Tanya [424]

yes i do because it is happening all around us

6 0
3 years ago
Read 2 more answers
Your boss would like to see the progress of your project and wants to know how long the project will take and which variances ex
Ulleksa [173]

The most likely tool we can use to show these details of how long the project will take and which variances exist is "Gantt chart".

<h3>What is Gantt chart?</h3>

One popular graphic representation of a project timeline is a Gantt chart. It is a kind of bar chart that displays the beginning and ending dates of a program's various components, including its resources, planning, and dependencies.

Some characteristics of Gantt chart are-

  • The Gantt chart is an visual aid for planning, controlling, and keeping track of particular activities and resources within a project.
  • It consist of a task list with progress bars for each activity.
  • It is the project management chart that is most frequently used.
  • For tasks like creating motorways, bridges, and dams, as well as for software development and creating other products and services, heavy industries employ Gantt charts.
  • The chart shows which tasks can be completed concurrently and which ones must wait until others have been performed in order to be started or finished.
  • It can assist in locating potential bottlenecks and locating work that might have been left off the project schedule.

To know more about the Gantt chart, here

brainly.com/question/13067654

#SPJ4

3 0
1 year ago
Other questions:
  • Explain how the Coercive Acts (Intolerable Acts) were both an effect of colonial actions and a cause of colonial action.
    6·2 answers
  • The study of why people's beliefs, attitudes, and behaviors can cause problems with others is a part of:
    15·2 answers
  • Who or what has influenced your political views?
    10·2 answers
  • Fourteen-year-old Juliana enjoys playing the piano and never needs prompting from her parents to practice. She writes music and
    13·1 answer
  • Plainchant developed principally for use in __________.
    5·2 answers
  • It is important to have critical friends around in order to strengthen your self-esteem.
    10·2 answers
  • what is the tree called than can reach higher than 100 feet A.evergreen? B.mangrove? C.bald crypress?
    6·2 answers
  • ¿te identificas o no con el pensamiento sofista? ¿por qué?​
    13·1 answer
  • What are the two reasons why the revolutions in 1848 that had swept Europe failed in<br> Austria?
    7·1 answer
  • Why is government action necessary to ensure the provision of public goods?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!