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
vampirchik [111]
3 years ago
11

A test car travels in a straight line along the x-axis. The graph in the figure shows the car’s position x as a function of time

. At which point is the velocity zero?

Physics
2 answers:
svetlana [45]3 years ago
8 0
If it is s-t graph , point is c
if it is v-t graph , point is e
antiseptic1488 [7]3 years ago
7 0

The instantaneous velocity is zero at point C and G.

Further Explanation:

The velocity of an object in motion at a specific time and at specific point is termed as instantaneous velocity. Along a path of motion the given points can be separated by some finite distance.

Concept:

The expression for the instantaneous velocity is:

\fbox{\begin\\v=\dfrac{{{x_1} - {x_o}}}{{{t_1} - {t_o}}}\end{minispace}}

Here, v is the velocity, {x_o} is the initial position, {x_1} is the final position, {t_1} is the final time and {t_o} is the initial time.

For instantaneous velocity at point A:

Substitute 20\text{ m} for {x_o}, 40\text{ m} for {x_1}, 0\text{ s} for {t_o} and 3\text{ s} for {t_1} in the above equation.

\begin{aligned}\\v&=\frac{{40{\text{ m}}-20{\text{ m}}}}{{3{\text{ s}}-0{\text{ s}}}}\\&=\frac{{20}}{3}{\text{ m/s}}\\&=6.67{\text{ m/s}}\\\end{aligned}

For instantaneous velocity at point B:

Substitute 20\text{ m} for {x_o}, 40\text{ m} for {x_1}, 0\text{ s} for {t_o} and 3\text{ s} for {t_1} in the above equation.

\begin{aligned}\\v&=\frac{{40{\text{ m}}-20{\text{ m}}}}{{3{\text{ s}}-0{\text{ s}}}}\\&=\frac{{20}}{3}{\text{ m/s}}\\&=6.67{\text{ m/s}}\\\end{aligned}

For instantaneous velocity at point C:

Substitute 40\text{ m} for {x_o}, 40\text{ m} for {x_1}, 3\text{ s} for {t_o} and 5\text{ s} for {t_1} in the above equation.

\begin{aligned}v&=\frac{{40{\text{ m}}-40{\text{ m}}}}{{{\text{5 s}}-3{\text{ s}}}}\\&=\frac{{-0{\text{ m}}}}{2}{\text{ m/s}}\\&=0{\text{ m/s}}\\ \end{aligned}

For instantaneous velocity at point D:

Substitute 40\text{ m} for {x_o}, 0\text{ m} for {x_1}, 5\text{ s} for {t_o} and 6\text{ s} for {t_1} in the above equation.

\begin{aligned}v&=\frac{{0{\text{ m}}-40{\text{ m}}}}{{{\text{6 s}}-5{\text{ s}}}}\\&=\frac{{-40{\text{ m}}}}{1}{\text{ m/s}} \\ &=-40{\text{ m/s}}\\ \end{aligned}

For instantaneous velocity at point E:

Substitute 40\text{ m} for {x_o}, 0\text{ m} for {x_1}, 5\text{ s} for {t_o} and 6\text{ s} for {t_1} in the above equation.

\begin{aligned}v&=\frac{{0{\text{ m}}-40{\text{ m}}}}{{{\text{6 s}}-5{\text{ s}}}}\\&=\frac{{-40{\text{ m}}}}{1}{\text{ m/s}}\\&=-40{\text{ m/s}}\\ \end{aligned}

For instantaneous velocity at point F:

Substitute 40\text{ m} for {x_o}, 0\text{ m} for {x_1}, 5\text{ s} for {t_o} and 6\text{ s} for {t_1} in the above equation.

\begin{aligned}v&=\frac{{0{\text{ m}}-40{\text{ m}}}}{{{\text{6 s}}-5{\text{ s}}}}\\&=\frac{{-40{\text{ m}}}}{1}{\text{ m/s}}\\&=-40{\text{ m/s}}\\ \end{aligned}

For instantaneous velocity at point G:

The instantaneous velocity is 0\text{ m/s}, because slope at on the curve at point G is parallel to the time axis.

Therefore, the instantaneous velocity is zero at point C and G.

Learn more:

1. Describe velocity https://brainly.in/question/3480664

2. Average velocity brainly.com/question/190072

3. Difference between speed and velocity

brainly.com/question/2880714

Answer Details:

Grade: Middle school

Subject: Physics

Chapter: Kinematics

Keywords:

Test, car travels, straight, line, x-axis, graph, figure, shows, position, function, time, velocity, zero, point C and G.

You might be interested in
If element X has 40 protons will it also have 40 electrons
Nataliya [291]
Yes, atoms need to be equal in protons and electrons
4 0
3 years ago
Read 2 more answers
Are small molecular units joined together in large molecules
inysia [295]
<span>Polymers are small molecular units joined together in large molecules.

hope this helps!</span>
7 0
3 years ago
A man jogs at a speed of 1.6 m/s. His dog
FromTheMoon [43]
I believe it is
1.6x=2.7(x-1.8)
1.1x=2.7*1.8
x~4.4
4.4*1.6
~7.1m
5 0
3 years ago
A train travels a distance of 2000 km at an average speed of 120 km per hour. How long did the trip take? SHOW WORK
Igoryamba
S = d/t, s = 120, d = 2000, t = ?
Input the values,
120 = 2000/t
Make t the subject of the formula by cross multiplying, Therefore,
120t = 2000
Divide both sides by 120
t = 16.7hrs  to 1 decimal place.
If you're asked to convert it, you can.


6 0
3 years ago
What is the Density of the rock?
Sindrei [870]
Your answer is gone be 3
4 0
3 years ago
Other questions:
  • Tectonic plates can include
    9·2 answers
  • Ok i bet none of you guys/girls can get this right there's three states of matter solid
    6·1 answer
  • Why does data need to be reliable
    5·2 answers
  • What are the largest and smallest resistances you can obtain by connecting a 36.0-Ω , a 50.0-Ω , and a 700-Ω resistor together?
    6·1 answer
  • True or false velocity has only magnitude
    6·1 answer
  • In an experiment similar to the one you performed in Week 3, an experimenter measures the count rate of a radioactive element 10
    15·1 answer
  • It is almost as if each outer planet is a solar system in its own right.<br><br> True or False
    15·2 answers
  • Tom puts a metallic cover over his car's windshield after parking. How does this control
    9·1 answer
  • The concentration of water vapor in the atmosphere known as
    6·1 answer
  • Which is an SI base unit that makes up part of the unit of energy?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!