Physics Middle School

Holden is trying to determine the velocity of his race car. He went 20 meters east, turned around, and went 40 meters west. His car was 20 meters from the starting line. This took 5 seconds.

What is the car’s average velocity?

4 m/s east
4 m/s west
12 m/s west
12 m/s east

Holden Is Trying To Determine The Velocity Of His Race Car. He Went 20 Meters East, Turned Around, And

Answers

Answer 1

The average velocity can be found by calculating the total displacement of the car and dividing it by the total time.

The car's average velocity is "4 m/s west".

First, we will find the total displacement as follows:

Total Displacement = 20 m (East) + 40 m (West)

Taking East direction as positive and west direction as negative, we get:

Total Diplacement = 20 m - 40 m

Total Displacement = - 20 m = 20 m (West)

Now, the average velocity of the car will be:

[tex]Average\ Velocity = \frac{Total\ Displacement}{Total\ Time}\\\\Average\ Velocity = \frac{20\ m\ (West)}{5\ s}\\\\[/tex]

Average Velocity = 4 m/s west

The attached picture shows the description of average velocity.

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Holden Is Trying To Determine The Velocity Of His Race Car. He Went 20 Meters East, Turned Around, And
Answer 2

Answer: b

Explanation: just put B :)

Related Questions

Many plants like soy bean and corn have been selectively bred. Do you think this is acceptable and whyyyyy or why notttt?

Answers

If it doesn’t produce it. Im sure its not acceptable.
Yes because there’s a reason to everything, like to make more product or to sell more.

Rocks in the Earth's mantle contain a higher percentage of _______ and _______ than do rocks in the Earth's crust.
A- silicon and oxygen
B- iron and silicon
C- iron and magnesium
D- magnesium and oxygen

Answers

The Answer is C - iron and magnesium :)
the answer is c.......

Explain the impact of objects in space on each other including: (1) the sun on the earth's and (2) the moon on the earth.

Answers

Answer: Its from 2. since are taking impact by the meteors.

Explanation:

(1) The sun impacts the Earth with gravity- the mass of the Sun keeps the Earth in orbit.
(2) The moon impacts the Earth with gravity. It keeps the two in orbit and also causes things like the tides.

Describe characteristics and identify oxidation-reduction(redox) reactions.

plz and thx

Answers

Answer:

I hope This helps

Explanation:

The majority of oxidation-reduction (redox) reactions share two critical features. One is that a reduction happens in both, while equivalent oxidation occurs; they are combined.

The oxidation - reduction (redox) reactions has the characteristics of changes in oxygen, hydrogen and electrons.

What are the characteristics and identify oxidation - reduction (redox) reactions?

Oxidation is the process  during the reaction the reactant loses the electron. Reduction is the process  during the reaction, the reactant gains the electron.

Redox reaction can be identified by knowing the number of oxidation. It can also be known through the atoms in this process should be bonded as ionic. During the reaction, the increase in oxidation number can be said as oxidation.

The different types of redox reactions are:

Decomposition reactionDisproportion reactionCombination reactionDisplacement reaction

These are the important characteristics of oxidation and reduction (redox) reactions.

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what does an unconformity in a sequence of rock layers reveal about geologic history?
a. An organism went extinct during that time

b. a layer of rock might have eroded causing a gap in the record

c. the layers of rock cover hundreds of square miles

d. the new rock layers have been deposited very quickly

Answers

your answer will be “ b “
The answer will be b

HELP ME ASAP PLEASE!!!!!!

A chemist begins experimenting with silver and records the following properties:


Silver is a white metal that is an excellent conductor of heat and electricity. Silver tarnishes when exposed to air and light. The density of silver is 10.49 g/cm 3. The melting point is 962 degrees C and the boiling point is 2000 degrees C. Which of the following is NOT a physical property?



density of silver is 10.49 g/cm 3



melting point is 962 degrees C



Silver tarnishes when exposed to air and light



boiling point is 2000 degrees C

Answers

Answer:

3. Silver tarnishes when exposed to air and light

Explanation:

Physical properties are properties that change substances in ways that is visible to a human by using their senses (ie. see, touch, etc)

The rest of the answers are chemical properties, which cannot be seen with the human senses, and requires other special devices or techniques to tell.

-Vibilities

Yall have helped a lot i just need help on this then ill be done for a while
Write a discussion post that contains the following:
Information about the magnetic field from the three websites you used.
What each author believes about the magnetic field.
What you believe about the magnetic field.
Citations for your three websites.

Answers

Answer:

f(x)=a(x - h)2 + k

Much like a linear function, k works like b in the slope-intercept formula. Like where add or subtract b would determine where the line crosses, in the linear, k determines the vertex of the parabola. If you're going to go up 2, then you need to add 2.

The h determines the movement horizontally. what you put in h determines if it moves left or right. To adjust this, you need to find the number to make the parentheses equal 0 when x equals -2 (because moving the vertex point to the left means subtraction/negatives):

x - h = 0

-2 - h = 0

-h = 2

h = -2

So the function ends up looking like:

f(x)=a(x - (-2))2 + 2

Subtracting a negative cancels the signs out to make a positive:

f(x)=a(x + 2)2 + 2Explanation:

(Fill in the blanks)For every force there is one that is_____in size but _________in direction.

Answers

Answer: For every force there is a reaction force that is equal in size, but opposite in direction.

Hope it helps:)

For every force, there are 2 components   one that is equal in size but opposite in direction.

What is force?

Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.

It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.

The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.

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