At what point does the rollercoaster have the most GPE? A,C B,A C,E D,B E,D

Answer:

-4m/s²

Explanation:

Given parameters:

Initial velocity  = 9m/s

Final velocity  = 1m/s

Time taken  = 2s

Unknown:

Acceleration  = ?

Solution:

The acceleration of a body is the change in velocity of a body with time.

    Acceleration  = [tex]\frac{Final velocity - Initial velocity }{time}[/tex]

Insert the parameters and solve;

    Acceleration  = [tex]\frac{1 - 9}{2}[/tex]  = -4m/s²

We can say, the car is decelerating at a rate of 4m/s²

Answer:

Erosion is the geological process in which earthen materials are worn away and transported by natural forces such as wind or water.

Explanation:

Destructive waves erode through four main processes; Hydraulic Action, Compression, Abrasion and Attrition.

Answer:

Below! ;)

Explanation:

Lots of people have the idea that erosion is where something is eroded away, and EVEN I thought that once, but erosion is the process in which parts of land are moved to a different province. Erosion can sometimes also bring in invacious species.

Hope this helps!

Have a nice day!

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Explanation:

To convert from °C to K, we use the expression below;

           tK = t°C + 273

tK = temperature in Kelvin

t°C = temperature in celcius

A.  50°C;

        tK = 50 + 273  = 323K

B. 10°C;

      tK = 10 + 273 = 283K

C. 17°C;

     tK  = 17 + 273 = 290K

D, -40°C

    tK = -40 + 273  = 233K

Answer:

Explanation:

To understand this, we need to reflect back to the law of motion, the first law to be précised.

It states that "A body will continue to be at rest or uniform/constant motion unless acted upon by an external force which is greater than the current force"  

So we can see that since the person continues to apply the same force at the same speed, the effect on the mover will be the same.

Answer:

What is the net force on the runner below if the

applied force is + 40 N and the resistive force is -2

N?

Explanation:

What is the net force on the runner below if the

applied force is + 40 N and the resistive force is -2

N?

Answer:

D 71.75

Explanation:

divide 2,009 miles by 28 hours

Answer: this might be wrong but my answer is A.

Explanation: it said "Running through the pattern are four smear lines about 0.5 - 1 cm apart and perpendicular to the bottom of the wall." and "perpendicular" is like not that big and not that small and A is "and his hand slid down along the wall as he collapsed." so I think it is A.

Answer:

the answer of this question is B

The reason why the feather does not accelerate at this rate when dropped near the surface of Earth is because of Air friction acts on the feather.

The Gravity or its acceleration due to it is regarded as 9.81 meters per second square, on the earth surface, because of the size of Earth and the distance we are on its surface from its center.

In space, gravity are said to be constant.

Conclusively, due to air resistance, acceleration throughout a fall gets less than gravity because it affects the movement of the falling object by slowing it down.

Learn more from

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Answer:

Friction drag force causes objects to slow down as they move through a fluid, such as air or water. ... As an object's speed increases, the drag force from the fluid increases exponentially.

Answer:

Friction slows down an object using its rough surface

Explanation:

Friction is the force between objects. friction moves in the opposite direction which slows it down, it is very helpful when you want to stop a moving object

Answer:

P.E = 2934.75

Explanation:

Potential energy can be defined as an energy possessed by an object or body due to its position.

Mathematically, potential energy is given by the formula;

[tex] P.E = mgh[/tex]

Where, P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

Given the following data;

Weight =645

Height = 4.55

[tex] P.E = mgh[/tex]

But we know that weight = mg = 645N

Substituting into the equation, we have;

[tex] P.E = 645 * 4.55 [/tex]

[tex] P.E = 2934.75 J[/tex]

Potential energy, P.E = 2934.75 Joules.

Answer:

D. 3 Ohms

Explanation:

Answer:

It would take 5

18.3

Explanation:

It depends on how fast it comes and the timing

Answer:

Explanation:

The velocity of the car can be found by using the formula

[tex]v = \frac{d}{t} \\ [/tex]

d is the distance

t is the time taken

From the question we have

[tex]v = \frac{400}{16} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

46.2m/s²

Explanation:

Given parameters:

Acceleration  = 18.2m/s²

Original force  = F

Decrease factor = 3.9

Unknown:

New acceleration = ?

Solution:

Let the original force  = F

            new force  = [tex]\frac{F}{0.39}[/tex]

        Original acceleration = 18.2m/s²

         new acceleration  = ?

According to newton's second law of motion;

       Force = mass x acceleration

  So,

        mass = [tex]\frac{Force}{Acceleration}[/tex]

   So; initial mass = final mass

                [tex]\frac{F }{18.2}[/tex]  = [tex]\frac{\frac{F}{0.39} }{acceleration}[/tex]

             [tex]\frac{F}{0.39}[/tex] x 18.2 = F x acceleration

            Acceleration = 46.2m/s²

Answer:

+27.29

Explanation:

To solve this problem we must use the following equation of kinematics.

[tex]v_{f}^{2} =v_{o}^{2}+2*g*x[/tex]

where:

Vf = final velocity [m/s]

Vo = initial velocity = 0 ( the ball is dropped)

g = gravity acceleration = 9.81 [m/s²]

x = distance = 38 [m]

Vf² = 0 + (2*9.81*38)

[tex]v_{f}=\sqrt{2*9.81*38} \\ v_{f} = 27.3 [m/s][/tex]

Answer:

Radio waves.

Explanation:

Radio waves are at the far left of the EMS with a low frequency. Higher frequencies, such as Gama rays, cause more harm than the lower frequencies

Answer:

Scalar

Explanation:

A physical quantity that is completely described by its magnitude; examples of scalars are volume, density, speed, energy, mass, and time. Other quantities, such as force and velocity, have both magnitude and direction and are called vectors.

Answer: initial velocity in y direction

Explanation: coz i did dis before XD

Answer:

bedrock?

Explanation:

The ground is in the way.

Answer:

If the net force is doubled the acceleration change in the same proportion, that is to say, it is doubled too.

Explanation:

We have that:

[tex] F = ma [/tex]

From the equation above we see that the acceleration is directly proportional to the force, so hence if the force is doubled:

[tex] F_{1} = ma_{1} [/tex]

[tex] 2F_{1} = ma_{2}  \rightarrow a_{2} = 2\frac{F_{1}}{m} = 2a_{1} [/tex]  

Therefore, If the net force is doubled the acceleration change in the same proportion, that is to say, it is doubled too.

I hope it helps you!

Answer:

37.25m/s

Explanation:

Acceleration is the change in velocity of an object with respect to time.

Acceleration = velocity/time

Given

Velocity = 250mi/hr

Convert to m/s

1mile = 1609.344m

1hr = 3600s

250mi/hr = 250mi * 1609.344/1 * 3600

250mi/hr = 402366/3600

250mi/hr = 111.76m/s

Time = 3 seconds

Get the acceleration:

Acceleration = 111.76/3

Acceleration = 37.25m/s

Hence the acceleration is 37.25m/s

Answer:

206 meters East

Explanation:

Assuming that the starting point of Lebron James 0. He ran from point 0 to 260 meters in the Eastern direction. His displacement is now 260 meters to the East.

He then turned from the Eastern to the Western direction - opposing directions - and then walked 54 meters to find his ball. His displacement from the starting point will now be:

260 - 54 = 206 meters in the Eastern direction.

Answer: 10 meters

Explanation:

Divide 200 by 20, for 20 seconds.

200 ÷ 20 = 10

The answer to the question is 10.

Answer: B, remains constant.

Answer:

solar energy, wind energy, geothermal energy, hydropower, and Bioenergy

Answer:solar energy, wind energy, geothermal energy, hydropower, and Bioenergy

Explanation:let me know if that helped

Given that,

Initial speed of a cat is 0 because it was at rest.

If it takes 1.2 s for the flowerpot to fall from the window, we need to find the height reached by the cat.

Using second equation of motion to find it as follows :

[tex]d=ut+\dfrac{1}{2}at^2[/tex]

Put u = 0 and a = g

[tex]d=\dfrac{1}{2}gt^2\\\\d=\dfrac{1}{2}\times 9.8\times (1.2)^2\\\\d=7.05\ m[/tex]

So, it will move to a height of 7.05 m.

Answer:

the answer is b : Rutherford’s results supported parts of Thomson's model, but also provided new data and interpretations.

Explanation:

i read that and read the answers this is only logical one

Answer:

0.240 g/cm3

Explanation:

Answer: A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. 

Hope that helps! :)