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
lukranit [14]
3 years ago
10

Velocity can be either positive or negative, depending on the direction of the displacement. The time interval, Ît, is always po

sitive. Why?
Physics
1 answer:
m_a_m_a [10]3 years ago
7 0

Answer:The time interval is always positive quantity because time always moves forward. Time can not be reversed.

Explanation:

Velocity is defined as rate of change of position nothing but the displacement. Displacement can be positive or negative.

In case of time interval, time is always a positive quantity. it is impossible to reverse the time. To obtain any displacement we need to measure the time taken. which has to be positive. It always moves forward.

You might be interested in
This illustration represents the compoundA)carbon oxide.B)carbon dioxide.C)carbon monoxide.EliminateD)monocarbon oxide.
pentagon [3]
B.) Carbon Dioxide because the carbon is surrounded by oxygen
3 0
3 years ago
Read 2 more answers
un movil que parte del reposo alcanza una velocidad de 75 m/s en 13 segundos ¿cual su aceleracion y el espacio que recorrio en l
Dmitriy789 [7]

Answer:

Acceleration = 5.77 m/s²

Distance cover in 13 seconds = 487.56 meter

Explanation:

Given:

Final velocity of mobile device = 75 m/s

initial velocity of mobile device = 0 m/s

Time taken = 13 seconds

Find:

Acceleration

Distance cover in 13 seconds

Computation:

v = u + at

75 = 0 + (a)(13)

13a = 75

a = 5.77

Acceleration = 5.77 m/s²

s = ut + (1/2)(a)(t²)

s = (0)(t) + (1/2)(5.77)(13²)

Distance cover in 13 seconds = 487.56 meter

8 0
2 years ago
Mamie clark was a psychologist who is known for her research on ?
koban [17]

Mamie Phipps Clark is a noted woman psychologist, best known for her research on race, self-esteem, and child development. Her work alongside her husband, Kenneth Clark, was critical in the 1954 Brown vs Board of Education case and she was the first black woman to earn a degree from Columbia University.

4 0
3 years ago
Read 2 more answers
If an object accelerates from rest, what will its velocity be after 1.3 s if it has a constant acceleration of 9.1 m/s^2?
HACTEHA [7]

\text{Given that,}\\\\\text{Initial velocity,} ~v_0 = 0~ \text{m~s}^{-1}\\\\\text{Time,  t = 1.3~sec}\\\\\text{Acceleration, a = 9.1 m s}^{-2}\\\\\\\\\text{Velocity,}\\\\v = v_0  +at\\\\\implies v = 0 + 9.1 \times 1.3 = 11.83~~ \text{m~s}^{-1}

5 0
2 years ago
When the force acting on the body equal to acceleration?
topjm [15]

Answer:

Acceleration and velocity Newton's second law says that when a constant force acts on a massive body, it causes it to accelerate, i.e., to change its velocity, at a constant rate. In the simplest case, a force applied to an object at rest causes it to accelerate in the direction of the force.

5 0
2 years ago
Other questions:
  • Using a rope that will snap if the tension in it exceeds 356 N, you need to lower a bundle of old roofing material weighing 478
    8·1 answer
  • Evan drew a diagram to illustrate radiation. What do the arrows represent? gases mixing with particles liquid moving through a v
    7·2 answers
  • The voltage across a resistor is found to be 1.5 V. It is also found that there is a charge of 2 Coulombs passing through the re
    8·1 answer
  • F = 50 N<br> m = 72 kg<br> m/s2
    15·1 answer
  • Which statements describe the energy in a food web? Select three options.
    12·1 answer
  • When a rocket lifts off what provides the momentum match of the upper lift
    6·1 answer
  • A block slides down a frictionless plane that makes an angle of 24.0° with the horizontal. What is the
    14·1 answer
  • Look in the comments. I d a r e y o u
    5·2 answers
  • Write the mathemetical relation between work force and displacement​
    5·1 answer
  • A spacecraft travels at 1.5 X 108 m/s relative to Earth. A process onboard the
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!