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
Vikentia [17]
3 years ago
12

Which statement explains how it is possible to carry books to school without changing the kinetic or potential energy of the boo

ks or doing any work?
a. by moving the book without acceleration and keeping the height of the book constant
b. by moving the book with acceleration and keeping the height of the book constant
c. by moving the book without acceleration and changing the height of the book
d. by moving the book with acceleration and changing the height of the book
Physics
1 answer:
Mamont248 [21]3 years ago
8 0

Answer:

a. by moving the book without acceleration and keeping the height of the book constant

Explanation:

FOR CONSTANT KINETIC ENERGY:

The kinetic energy of a body depends upon its speed according to its formula:

ΔK.E = (1/2)mΔv²

So, for Δv = 0 m/s

ΔK.E = 0 J

So, for keeping kinetic energy constant, the books must be moved at constant speed without acceleration.

FOR CONSTANT POTENTIAL ENERGY:

The potential energy of a body depends upon its height according to its formula:

ΔP.E = mgΔh

So, for Δh = 0 m/s

ΔP.E = 0 J

So, for keeping potential energy constant, the books must be moved at constant height.

So, the correct option is:

<u>a. by moving the book without acceleration and keeping the height of the book constant</u>

You might be interested in
When most chemical reactions take place, some ____ in the reactants must be broken, a process that requires energy.
BabaBlast [244]

Answer:

compound I believe number 1

6 0
3 years ago
Read 2 more answers
which word means "the history of life in the geologic past as indicated by the imprints or remains of living things?
love history [14]
The history of life in the geologic past as indicated by the imprints or remains of living thing is called FOSSIL RECORD.<span> It is the evolution that unfolded over trillion of years as natural and environmental interacts based on the natural selection. The fossil record is among the most popular evidences of evolution. It shows the way of living, the type of people, the survival struggles of the ancient people in the old times. All these types of remains are recorded that makes up the fossil record. </span>
4 0
3 years ago
what would happen to the size of the shadow if the distance between the light and the hand is increased.
Sergio039 [100]
I don’t think I will have any time to go
8 0
3 years ago
Both slicing a tomato and a chemical change such as burning toast cannot be reversed. however why is slicing a tomato sill consi
kondaur [170]
Slicing a tomato is still considered a physical change because you are only altering the shape of it by slicing it. It does not change color or make bubble when slicing the tomato. Therefore, it is still a physical change
hope this helps:)
4 0
3 years ago
How much voltage is required to run 0.025 A of current through a 36 Ω resistor?
aalyn [17]

Yes D is definitely the answer

<em>V</em><em>=</em><em>I×</em><em>R</em>

<em>V</em><em>=</em><em>0</em><em>.</em><em>0</em><em>2</em><em>5</em><em>×</em><em>3</em><em>6</em>

<em>V</em><em>=</em><em>0</em><em>.</em><em>9</em><em> </em><em>sa</em><em>me</em><em> </em><em>as</em><em> </em><em>0</em><em>.</em><em>9</em><em>0</em>

7 0
3 years ago
Other questions:
  • A 250-gram cart starts from rest and rolls down an inclined plane from a height of 0.541m. Determine its speed at the bottom of
    5·1 answer
  • A baggage handler at an airport applies a constant horizontal force with magnitude F1 to push a box, of mass m, across a rough h
    11·1 answer
  • What change occurs to the gravitational force of attraction between two bodies when the
    6·1 answer
  • This type of telescope uses a lens to collect<br> light.
    9·1 answer
  • A guitar string of length L = 0.94 m is oriented along the x-direction and under a tension of T = 92 N. The string is made of st
    5·1 answer
  • A person's speed around the Earth is faster at the poles than it is at the equator.
    11·1 answer
  • A woman walked 115 m. As she did so, her speed increased from 4.20 m/s to 5.00 m/s. How long did it take her to walk this distan
    14·1 answer
  • Plzzzzzzzzzzzzz helppppp 20 points
    10·1 answer
  • 2. Two spherical objects with radii 1 m have masses of 1.5 kg and 8.5 kg. They are separated by a
    7·1 answer
  • Provide three examples of situations in which mass is the main factor determining an object's momentum
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!