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
Tanya [424]
3 years ago
9

Acceleration is generally defined as the time rate of change of velocity. When can it be defined as the time rate of change of s

peed?
Physics
2 answers:
Lena [83]3 years ago
8 0

Answer:

When the velocity doesn't change its direction

Explanation:

Since velocity vector has 2 components: direction and magnitude, and speed is the velocity's magnitude. So if the velocity doesn't change its direction, we essentially use its magnitude, aka speed, to calculate the rate of change for acceleration.

Digiron [165]3 years ago
7 0

Answer:

When direction does not change or is not involved/required.

Explanation:

Acceleration is the time rate of change in velocity. This is because like velocity, acceleration is a vector quantity and has to do with change in direction. But then, a particle can still accelerate without a change in direction. In this case, acceleration can be defined as the time rate of change of speed. This is because, since direction is not involved, speed which is a scalar quantity, has nothing to do with direction.

In essence, speed and velocity are the same when direction is not involved or when direction is not changing. Therefore, in the definition of acceleration, if there are no regards for direction, speed can be used in place of velocity.

You might be interested in
What is the strength of the electric field between two parallel conducting plates separated by 1.00 cm and having a potential di
yan [13]
What is the strength of the electric field between two parallel conducting plates separated by 1.00 cm and having a potential difference (voltage) between them of 1.50×10^4v ?
3 0
1 year ago
As an object moves along the x axis, many measurements are made of its position, enough to generate a smooth, accurate graph of
Bas_tet [7]
The best and most correct answers among the choices provided by your question are he second and third choices. 
<span>The velocity at any instant the average velocity during some time interval cannot be obtained from the graph alone.</span>


I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
6 0
3 years ago
Read 2 more answers
Learning Goal: To understand the nature of a sound wave, including its properties: frequency, wavelength, loudness, pitch, and t
Lady_Fox [76]

Answer:

Sound wave is a longitudinal wave that propagates in a medium

Explanation:

<em>Part A:</em> (C) Sound wave is propagation of pressure fluctuations in a medium.

<em>Part B: </em>(C) Pressure fluctuations travel along the direction of propagation of         the sound wave.

<em>Part C: </em>(A) Yes air play a role in the propagation of the human voice from one end of the lecture hall to the other.

5 0
3 years ago
You have a pulley 10.4 cm in diameter and with a mass of 2.3 kg. You get to wondering whether the pulley is uniform. That is, is
madreJ [45]

Answer:

Explanation:

Given

Diameter of Pulley=10.4 cm

mass of Pulley(m)=2.3 kg

mass of book(m_0)=1.7 kg

height(h)=1 m

time taken=0.64 s

h=ut+frac{at^2}{2}

1=0+\frac{a(0.64)^2}{2}

a=4.88 m/s^2and [tex]a=\alpha r

where \alphais angular acceleration of pulley

4.88=\alpha \times 5.2\times 10^{-2}

\alpha =93.84 rad/s^2

And Tension in Rope

T=m(g-a)

T=1.7\times (9.8-4.88)

T=8.364 N

and Tension will provide Torque

T\times r=I\cdot \alpha

8.364\times 5.2\times 10^{-2}=I\times 93.84

I=0.463\times 10^{-2} kg-m^2

I_{original}=\frac{mr^2}{2}=0.31\times 10^{-2}kg-m^2

Thus mass is uniformly distributed or some more towards periphery of Pulley

4 0
3 years ago
What are the effects of global warming in simple words?
alukav5142 [94]
Answer is Global Warming causes destruction of our ecosystem due to increased temperatures, drought, fire, weed and pest infestations, more intense storms, water shortages, melting ice caps and glaciers, air pollution.

3 0
1 year ago
Other questions:
  • You're driving down the highway late one night at 20 m/s when a deer steps onto the road 49 m in front of you. You reaction time
    9·1 answer
  • When all parts of a circuit are composed of conducting materials, the circuit is said to be
    6·1 answer
  • This solid layer of the earth is made of mostly iron and nickel.
    5·1 answer
  • “A horse pulls on a cart. By Newton’s third law of motion, the cart pulls back on
    13·2 answers
  • A woman is standing at the rim of a nonuniform cylindrical horizontal platform initially at rest. The platform is free to rotate
    15·1 answer
  • Anne should use a to transfer electric energy into motion. She should also use a to start and stop the flow of current.
    15·1 answer
  • A 10-turn coil of wire having a diameter of 1.0 cm and a resistance of 0.30 Ω is in a 1.0 mT magnetic field, with the coil orien
    12·1 answer
  • Difference between dynamo and generator
    11·1 answer
  • ___________ have the highest rates of star formation
    6·1 answer
  • An electromagnet is created using a battery, an insulated copper wire and an iron nail. The wire is wrapped around the nail 30 t
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!