Physics High School

A girl runs 40m due south in 40 seconds an d then 20m due north in 10 secondsCalculate.
the average speed,
her average velocity .
in her change in velocity for the whole journey!​

Answers

Answer 1

The average speed of the girl is 1.2 m/s.

Average velocity is defined as the trade in position or displacement (∆x) divided by the time durations (∆t) wherein the displacement takes place. The common velocity can be effective or negative depending upon the sign of the displacement. The SI unit of average velocity is meters per second (m/s or ms-1).

Given;

Total distance = 40 + 20 = 60 M

Displacement = 40 - 20 = 20 m south

total time = 40 + 10 = 50 seconds

Average speed =  total distance / total time

                          = 60/50

                          = 1.2 m/s

average velocity = total displacement / total time

                            = 20 / 50

                             = 0.4 m/s due south.

Average velocity is calculated by means of dividing your displacement (a vector pointing out of your initial role in your final position) through the entire time; the average pace is calculated by way of dividing the overall distance you traveled by means of the total time.

Learn more about average velocity here:-brainly.com/question/1844960

#SPJ1

Related Questions

The distance between the two nearest points on a wave where the particles are in phase is 2 m. What is the wavelength of the wave?

A. 1/2 m

B. 1 m

C. 2 m

D. 2 seconds

E. none of these

Answers

Answer:

Suppose that the wave equation is:

f(x) = A*cos(k*x)

The wave is in phase for two points x₁ and x₂ if:

f(x₁) = f(x₂)

And if these points are consecutive (for example, two consecutive peaks) then the wavelength of the wave is:

wavelength = x₂ - x₁

In this case, we know that the wave is in phase for two points that are 2 m apart.

Then we can use the points:

x₁ and x₂ such that:

x₂ = x₁ + 2m

We also know that these are the nearest points such that this happens, then we can assume that the points are consecutive.

Then the wavelength will be:

wavelength = x₂ - x₁ = (x₁ + 2m) - (x₁) = 2m

Then the wavelength is 2m.

The correct option is C.

Other Questions
Old Man Warner's dialogue in the following passage (paragraph 32) mainly suggests... Used to be a saying about 'Lottery in June, corn be heavy soon.' First thing you know, we'd allbe eating stewed chickweed and acorns. There's always been a lottery," he added petulantly.Bad enough to see young Joe Summers up there joking with everybody."A. the power of a tradition like the lotteryB. that he is much wiser than the other villagersC. that the lottery is necessary for the village's survivalD. that he is the story's villain Like in a cat's eye, the human pupil changes shape in response to changes inthe environment. What is the most likely function of this structure?A. To allow humans to readB. To allow humans to see clearly in different levels of lightC. To allow humans to see shades in colorD. To allow humans to see at varying distances Plant roots are not green, why? Also what do the roots of a plant provide for the plant? Hello Kitty has created a new system of conversion for the residents of Kitty Nation. The standard for measurement of length in Kitty Nation is that 8 lenthii = 30 inches and 4 gianthii = 478.8 lenthii. If a design to be sent to Kitty Nation is 294.3 feet long, how many gianthii long will it be? (Include units) What is true about market economies?A. People are free to start their own business.B. There is limited technology to advance products.C. People cannot start their own business.D. The government makes all of the economic decisions. What weather problem happenend out West on the Great Plains that cause many farmer to move away.Question 13 options:Ten years of rainTen years of drought (no rain)Ten years of locusts (grasshoppers)Ten years of freezing weather True/FalseThe purpose of a parody is to entertain. The results of photosynthesis as glucose and oxygenA) PhotosynthesisB)ProductsC)ChloroplastsD)Glucose Explain how a school bus uses all of these energy types.-Mechanical-Chemical-Electrical -Thermal In which trend of the Young Nation Period did women take a leading role?A) Increasing the power of the federal government.B) Expanding the size and power of the United States.c) Becoming more successful and powerful in dealing with foreign countries.D) Reforming social problems within the United States. can someone help me plz About how many years passed betweenColumbus's voyage, and Cook's discoveryof Australia? Mr. Schmidt cuts 1/4 of a piece of construction paper. He uses 1/5 of the piece to make a flower. What fraction of the sheet of paper does he use to make the flower? the CN Tower of Toronto, Canada is 553 M tall. how tall is the tower in cm Which of the following tests are used to diagnose the presence of HIV? pap smears Western Blot & ELISA Eastern Blot & HISA Pregnancy tests A random sample of dogs at different animal shelters in a city shows that 12 of the 65 dogs are puppies. The city's animal shelters collectively house 1,690 dogs each year. About how many dogs in all of the city's animal shelters are puppies? How did both Communism and Fascism use aspects of totalitarianism in their governments? Which line has the steepest graph? Please answer all of them! SHOW WORK!! Find and interpret the standard deviation of the set of data. 7. {6, 8, 2, 3, 2, 9}