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
Viktor [21]
3 years ago
5

A ball is thrown upward. At a height of 10 meters above the ground, the ball has a potential energy of 50 Joules (with the poten

tial energy equal to zero at ground level) and is moving upward with a kinetic energy of 50 Joules. What is the maximum height h reached by the ball? Consider air friction to be negligible.
A. h ≈ 30 m
B. h ≈ 40 m
C. h ≈ 50 m
D. h ≈ 10 m
E. h ≈ 20 m
Physics
1 answer:
Brilliant_brown [7]3 years ago
6 0

Given that,

A ball is thrown upward. At a height of 10 meters above the ground, the ball has a potential energy of 50 Joules. It is moving upward with a kinetic energy of 50 Joules.

We need to find the maximum height h reached by the ball. Let at a height of 10 meters, it has a potential energy of 50 Joules. So,

mgH=50\\\\mg=\dfrac{50}{h}\\\\mg=\dfrac{50}{10}\\\\mg=5\ N ........(1)

Let at a height of h m, it reaches to a maximum height. at this point, it has a total of 100 J of energy. So,

mgh=50+50\\\\mgh=100\\\\h=\dfrac{100}{5}\\\\h=20\ m

So, the correct option is (E) "h = 20 m".

You might be interested in
Resting energy expenditure is a. slightly higher than basal energy expenditure. b. the same as basal energy expenditure. c. slig
kvv77 [185]

Answer:

B. Resting energy expenditure is the same with basal energy expenditure.

Explanation:

Basal Energy Expenditure can be explained as the energy required to execute essential metabolic functions e.g. coordination of enzymatic reactions in the body system.

On the other hand, Resting Energy Expenditure can be simply explained as the amount of energy expended or burnt when the body is resting.

Hence, in the context of definitions, and relating both definitions, it can be argued that Basal energy expenditure is simply the energy needed to execute essential metabolic functions e.g. coordination of enzymatic reactions in the body, with special emphassy on the body being at rest. Thus, in this context, Basal energy can be looked at through the prism of Resting energy expenditure. Consequently, this two definitions can be used interchangeably, with a special emphassy on perspective.

6 0
4 years ago
What is the water table?
Setler [38]

The subsurface zone in which all openings of the rock are filled with water is called the zone of saturation.

8 0
4 years ago
Drag the correct labels to the box. Not all labels will be used. Identify the examples of persuasive writing. We must act to pre
OLEGan [10]

Answer:

Persuasive: "Banning all video games is not the answer to reducing violence in our society. People argue that violent games harm our culture and should be banned. However, this action would go against the freedom of choice." "The New York Times reports that over a million students in the United States are now taking courses online. Online learning may be more convenient for students and teachers. However, it appears to be just an attempt by schools to save money." "We must act to preserve the rain forests of the Amazon. According to the World Wildlife Fund, 17 percent of  the rain forest has been cleared in the past 50 years."

Explanation:

I know

4 0
3 years ago
A 60kg student is sitting in a chair and is not moving. what is the force of a student acting on the chair? what is the force of
vazorg [7]

The force with which the student is acting in the chair and the force of the chair acting on the student is 588 N

Explanation:

  • There are two kinds of forces acting on you when you are sitting on the chair, they are the gravitational force and the force exerted by the chair on you.
  • The forces acting on the chair when you are sitting are the gravitational force and the force exerted by you.
  • As per  Newton's third law of motion, for every action, there is an equal and opposite reaction.
  • Hence, F = ma

        that is, F = 60 * 9.8

                       =588 N

  • So, 588 N force should be applied from both sides then only you can sit properly in the chair.
7 0
3 years ago
A baseball (m=145g) traveling 39 m/s moves a fielder's glove backward 23 cm when the ball is caught.
Grace [21]

The average force exerted by the ball on the glove is 480 N.

<h3>What is the force exerted by the ball on the glove?</h3>

The average force exerted on the glove by the ball is equal in magnitude to the force on the ball.

  • Force = mass * acceleration

mass = 145 g = 0.145 kg

Acceleration of the baseball, a = (v² - u²)/2s

where:

v is final velocity = 0

u is initial velocity = 39 m/s

s is distance = -23 cm = 0.23 m

a = (0 - 39²)/2(-0.23)

a = 3306.52 m/s²

Force = 0.145 * 3306.52

Force = 479.4 N

Average force = 480 N

In conclusion, force is derived from the product of mass and acceleration.

Learn more about force at: brainly.com/question/12970081

#SPJ1

5 0
2 years ago
Other questions:
  • if the forces acting upon an object are balanced, then an object must a) be moving. b) be accelerating. c) be beginning to slow
    5·1 answer
  • The products of one turn of dark reaction cycle are called
    14·1 answer
  • Measuring which physical property is most likely to produce the most precise results when trying to identify a substance? luster
    12·2 answers
  • The ph balance is maintained by which organ?
    7·1 answer
  • 15 POINTS! ANSWER CORRECTLY FOR BRAINLIEST!
    14·2 answers
  • Name two types of evidence used to support the theory of evolution. Explain how scientists use each type of evidence to provide
    5·1 answer
  • What force pulls the moon towards the earth?
    14·1 answer
  • A football player runs from his own goal line to the opposing team's goal line, returning to his forty-yard line, all in 22.4 s.
    15·1 answer
  • Please help<br>Will give the brainliest!​
    9·1 answer
  • Recall that impulse = momentum (FAt = Ap and that Ap is just mx v). How long (time) must a group of people pull with a force of
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!