Physics High School

A 2.00 kg ball is thrown upward at some unknown angle from the top of a 20.0 m high building. If the initial magnitude of the velocity of the ball is 20.0 m/s. What is the magnitude of the
FINAL VELOCITY when it strikes the ground? (Note: Ignore air resistance.)

Answers

Answer 1

Answer: 28.1

Explanation:

Answer 2

The total energy of the ball is the sum of its kinetic and potential energy. It is equal to 792 J. Then, the final velocity of ball when its strikes the ground is 28.1 m/s.

What is kinetic energy?

Kinetic energy of an object is the energy gained by its motion whereas, potential energy is stored on the object when the object is at rest.

The total mechanical energy of the ball = Ke + Pe

given, mass of the ball = 2 Kg

height h= 20 m

initial velocity = 20 m/s

Then total energy = 1/2 mv² + mgh =  2 kg  [(1/2(20 m/s)² + 9.8 m/s² ×20 m ] = 792 J.

The final velocity Vf = √(2E/m) =√(2×792 J/m)/2 Kg = 28.1 m/s

Therefore, the final velocity of the ball will be 28.1 m/s.

Find more on kinetic energy:

https://brainly.com/question/11749818

#SPJ5

Related Questions

Calculate the resistance of an electric blanket that draws 9 A to transform 50 W of energy.

Answers

Answer:

The resistance is 0.617Ω.

Explanation:

Given that the formulas are V = I × R and P = I × V so when you substitute the V formula into P formula, you will get P = I² × R. Using this formula, you can find the resistance :

P = I² × R

50 = 9² × R

50 = 81 R

50 ÷ 81 = R

R = 0.617Ω (3sf)

HELP PLS 100 POINTS TAKING TEST RN


Suppose you are in a car that is going around a curve. The speedometer reads a constant 30
miles per hour. Which of the following is NOT true?

You and the car are accelerating.

Your speed is constant.

Your velocity is constant.

Your acceleration is constant.

Answers

Answer:

sorry I hate when people press your question and answer with a fake answer for points, however you said it was 100 points and it's not even close lol but it is "your speed Is constant" that is not true

PLEASE HELP BRANILIEST
The earliest goalie masks used were made from______________________.
Group of answer choices

Stone

Candy

Fiberglass

Wood

Answers

Answer: It’s Fiberglass

Answer:

The earliest goalie masks used were made from Fiberglass.

Explanation:

Hope that helps

Have a good day

Other Questions
Manuel no fue _____ a la fiesta. Mrs. Wright makes cookies for the school bake sale. She uses the equation y = 0.50x to determine the cost, y, for x cookies. Which best represents the constant rate at which cookies are sold at the bake sale? The Answer choices are......A.50 cookies per dollarB. 5 cookies per dollarC.$0.50 per cookieD.$2 per cookie Suppose Pepsi-Cola which includes Mount dew and several other sodas purchase Coca-Cola and cokes families of sodas to form one large metal company what do you believe would happen to the price of sodas in the United States What is the maximum mass of ammonia (NH3) that can be produced from the synthesis reaction of 781 g of nitrogen and 656 g hydrogen?HINT: You will need to write a balanced chemical equation and perform 2 calculations before you can determine the answers. Simon makes a model of a boat, using a scale of 1 : 30If the model has a height of 40 cm, find the height of the real boat.Give your answer in metres. the measures of the angles of a triangle are shown in the figure below solve for x 46 2x+20 72 Can anyone fill this out for me!!! Hi this question is just for people to get points from answering have a wonderful day :) Please help with this His countenance was thoroughly good-humoured; and his manners were as friendly as the style of his letter. Their arrival seemed to afford him real satisfaction,and their comfort to be an object of real solicitude to him. He said much of his earnest desire of their living in the most sociable terms with his family, and pressedthem so cordially to dine at Barton Park every day till they were better settled at home, that, though his entreaties were carried to a point of perseverancebeyond civility, they could not give offence. His kindness was not confined to words; for within an hour after he left them, a large basket full of garden stuff andfruit arrived from the park, which was followed before the end of the day by a present of game. He insisted, moreover, on conveying all their letters to and from thepost for them, and would not be denied the satisfaction of sending them his newspaper every day. He wasbenevolentperceptivebrusqueintimidating Describe where the Byzantine Empire fell within Roman territory. nWhich statement provides the best comparison of General George Patton and General Dwight Eisenhower?O Both represented the US at the Yalta Conference.O Both served terms as Supreme Allied Commander.O Both led American forces in successful campaigns in Europe.O Both were involved in planning and leading the D-Day invasion. pls help due asap Thanks in advance D.because the time is used up due to irrelevant and unnecessary topics& Every time your group conducts a meeting, nothing is accomplishedthat intervene the discussion.As the group leader, how will you keep your members focused on theagenda of the meeting using the restriction strategy?A. Tell them that they will get kicked out from the group if they willB. End the meeting immediately as soonas the group begins totalk about other things irrelevant to the agenda.c. Give instructions before the meeting starts to confine and limitwhat they can say.D. Show disappointment.not cooperate. En el prrafo 1, la palabra incrementado significa -A. aumentadoB. implementadoC. reducidoD. restringido What is most likely to increase both the nutrient levels and the bacterial content of lake water? If gas costs $1.95 per gallon, how many whole gallons of gas could you buy with $36.00? (Make sure to answer with a whole number.) 1. Qu conexin tiene la navidad con el descubrimiento de Amrica? Dramatic irony occurs when the words and actions of the characters in a work of literature have a different meaning for the reader than they dofor the characters. oThis happens when readers have more knowledge about what its taking place than the characters themselves. How doesMark Twain use dramatic irony to create humor in The Adventures of Tom Sawyer? Use evidence from the story to support your response. The following statements are from Enlightenment philosophers:1. That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed.2. Constant experience shows us that every man invested with power is apt to abuse it.3. Where the whole power of one department is exercised by the same hands which possess the whole power of another department, the fundamental principles of a free constitution are subverted.4. You are free at all times, in all places, as soon as you do what you wish to do.Which statement reflects the idea of a social contract? (3 points)Select one:a. 1b. 2c. 3d. 4