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
Dmitry [639]
1 year ago
10

kg book is lying ona 0.80 m -high table. You pick it up and placeit on a bookshelf 2.2 mabove the floor.a.During this process, h

ow much work does gravity do on thebook. Express your answer to two significant figuresand include the appropriate units.b. During this process, how much work doesyour hand do on the book?Express your answer to two significant figures and include theappropriate units.
Physics
1 answer:
Sergeu [11.5K]1 year ago
8 0

The work done by gravity is  43 J while the work done by your habd is 27 J.

<h3>What is the work done?</h3>

We know that all over the earth is a large gravitational field. If an object is placed at a given height, the kind of energy that the object would be said to possess at that height is the gravitational potential energy. This is the kind of energy that a body would have because it is found at a given height on the earth surface.

Now, we know that gravity does some work on the book as it found to be at a position of about 2.2 on top of the shelf. The work that is done by the force of gravity on the book is obtained as;

W = mgh

W = work done

m = mass

g = acceleration due to gravity

h = height

W = 2 * 9.8 * 2.2

= 43 J

The work that is done by your hand =

W = 2 * 9.8 (2.2 - 0.8)

= 27 J

Learn more about work done:brainly.com/question/10334435

#SPJ1

You might be interested in
What is the reaction force of the table with a weight of 558N
Delicious77 [7]

Answer: reaction force = -558N

Explanation:

w = f = 558N

since action force and reaction force are equal in magnitude and opposite in direction,

reaction force = -(f)

reaction force = -558N

if that helps.

8 0
3 years ago
5. Emanuel Zacchini, the famous human cannonball of the Ringling Bros. and Barnum and Bailey Circus,
Strike441 [17]

Explanation:

सिद्ध कीजिए किसी भी बराबर भुजाओं वाले त्रिभुज में उनके सामने के कोण बराबर होते है

3 0
2 years ago
A tennis ball travelling at a speed of 46m/s with a mass of 58kg. Calculate the kinetic<br>energy​
Zanzabum

Answer:

its 1/2 the mass of the object times by its velocity ^ 2

7 0
3 years ago
Carpet can keep a room quiet by:
taurus [48]
Hard surfaces reflect sound back into the room, while carpets help to absorb the sound so it reflects less
6 0
3 years ago
A friend in your class tells you that she never uses hints when doing her Mastering homework. She says that she finds the hints
AnnZ [28]

Answer:

A, B, and C are good reasons for my friend not to worry

Explanation:

The following reasons are reason not to worry

A. The only way to lose additional partial credit on a hint is by using the "give up" button or entering incorrect answers. Leaving the question blank will not cost you any credit (Regardless of whether you open a link or not, you will lose credit if you enter a wrong answer or if you give up on a question by hitting the "give up" button. Even after opening a hint, you can leave the question blank if the hint does not provide relevant hints or if the hint brings up more question. Once the question is left blank, you do not lose additional partial credit)

B. As an incentive for thinking hard about the problem, your instructor may choose to apply a small hint penalty, but this penalty is the same whether the hint simply gives information or asks another question (In a situation where you decide to use a hint, the instructor may have put a penalty for using the hint, so whether it asks a question or help in the solution of the question, as long as the hint is consulted, the hint penalty still applies)

C. Getting the correct answer to the question in a hint actually gives you some partial credit, even if you still can't answer the original question (An advantage of using hint is that you get some partial credit for using it if you answer the hint question correctly and fails to answer the original question)

6 0
3 years ago
Other questions:
  • In terms of positive and negative charges what causes lightning?
    10·1 answer
  • When a car's velocity is positive and its acceleration is negative, what is happening to the car's motion?
    9·1 answer
  • Which of the following are scalar quantities?
    6·1 answer
  • The law of harmonies is referred to as _____.
    7·1 answer
  • A power plant produces 1000 MW to supply a city 40 km away. Current flows from the power plant on a single wire of resistance 0.
    11·1 answer
  • A car is moving with a constant acceleration. At t = 5.0 s its velocity is 8.0 m/s and at t = 8.0 s its
    10·1 answer
  • In scientific notation, 0.00074m can be written as 1- 0.74×10‐³m 2- 7.4×10-⁴m 3- 74×10‐⁵m 4- 740×10‐⁶m
    8·1 answer
  • What happens to our bodies if we do not eat nutritious meals? give three reasons.​
    10·2 answers
  • 1. Predict whether the energy required to remove an electron from magnesium and potassium would be more or less than that requir
    12·1 answer
  • 12,3,14,10,13,8 step 3 of 3 : determine if the data set is unimodal, bimodal, multimodal, or has no mode. identify the mode(s),
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!