Physics High School

A tourist stands at the top of the Grand Canyon, holding a rock, overlooking the valley
below. Find the final velocity, and displacement of the rock after 4.0 seconds give the three
initial conditions listed below.

Answers

Answer 1

Answer:

a. Vf = 39.24 [m/s]

b. Vf = 31.24 [m/s]

c. Vf = 47.24 [m/s]

Explanation:

To solve this problem we can use the following equation of kinematics. We have to keep in mind that the gravitational acceleration acts downwards, therefore when the rock falls towards the abyss it has the same direction of the acceleration and that is why the gravitational acceleration has a positive sign in the equation.

[tex]v_{f}=v_{o}+g*t[/tex]

where:

Vf = final velocity [m/s]

Vo = initial velocity = 0 (when the rock is dropped)

g = gravitational acceleration = 9.81 [m/s²]

t = time = 4 [s]

a.

[tex]v_{f}=0+9.81*4\\v_{f}= 39.24 [m/s][/tex]

b.

In this particular situation, the acceleration will be taken as negative because the gravity is pointing in the opposite direction of the movement of the rock.

[tex]v_{f}=8-(9.81*4)\\v_{f}=-31.24[m/s][/tex]

The negative sign in the answer tells us that the rock no longer moves up instead it does downwards when 4 seconds have passed.

c.

[tex]v_{f}=8+(9.81*4)\\v_{f}=47.24[m/s][/tex]

Related Questions

1. The coin remains at rest in the figure shown. This is due to
(a) inertia of rest
(b) two forces act on the coin which balance each other
(c) no unbalanced force acts on it
(d) all of these​

Answers

D would be correct.

Have a merry Christmas!
D I hope it helps have a good day

How does variation impact natural selection?

Answers

The answer to this is D!

the rubber covering over a wire acts as a / an ?​

Answers

Answer:

Most electrical wire is covered in a rubber or plastic coating called insulation. The purpose of insulation covering the metal part of an electrical wire is to prevent accidental contact with other conductors of electricity, which might result in an unintentional electric current through those other conductors.

Explanation:

HELP ASAP!! WILL TRY TO GIVE BRAINLIEST

How are ribosomes different from other complex animal cell organelles?

Answers

Explanation:

Ribosomes are not quite the same as different organelles since they have no layer around them that isolates them from different organelles, they comprise of two subunits, and when they are creating sure proteins they can become film bound to the endoplasmic reticulum, however they can likewise be free drifting while at the same time performing

what do you know about atom

Answers

Answer:

The smallest part of the elements which contains matters in them are atoms :)

How much power does it take to do 1000 J of work in 8 seconds?

Answers

Power = work/time
1000/8 = 125
Answer: 125 watts

Uncle Harry weighs 750 N. What is his mass in kg?

Answers

Answer:

W = MG

750 = M * 10

M = 750/10

M = 75 kg

Answer:

76.479 Kilograms Force (kgf)

Explanation:

SHOW ME YOUR SMARTS FOR BRAINLIEST
Why is the value of a substance’s specific gravity always the same numerically as its density?

Because it is always the substance’s density divided by the density of water which is 1 g/cm 3
Because it is always the substance’s density multiplied by the density of water which is 1 g/cm 3
Because specific gravity is the inverse of density
Because these represent the same measurement

Answers

Answer:

Because it is always the substance’s density divided by the density of water which is 1 g/cm 3

Explanation:

The density of water is 1g/cm³;

  Specific gravity = [tex]\frac{density of substance}{density of water}[/tex]

Since specific gravity is a relative comparison of a substance density with that of water, the values always the same.

Density of water is 1 and it will have no effect on the density of the substance.

The only difference is in the units. The density of a substance will have a unit but that of the specific gravity will have no unit.

Numerically, dividing by 1 has no implication.

Answer:  the answer is C

Explanation:Specific gravity is the density of a substance divided by the density of water. Since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

How are water scarcity and water pollution related?
Water pollution contributes to water scarcity.
Water pollution is a solution to water scarcity.
Water scarcity is a solution to water pollution.
Water scarcity contributes to water pollution.

Answers

Answer:

A. Water pollution contributes to water scarcity.

Explanation:

Water pollution occurs when materials are disposed in water body, thus making it unfit for use. A polluted water can not be used for various purposes that water can be used for. Examples include: recreation, drinking, washing etc.

Water scarcity is the situation when available water is not sufficient for the use of organisms in a community. This majorly occurs in arid area.

Thus, since a polluted water renders water to be useless, therefore water pollution contributes  to water scarcity.

Answer:

Water contributes to water scarcity

Explanation:

pls nobody has ever given me brainiest pls give me brainliest

A car is traveling at an average speed of 120km/h.how long will it take to travel between two station 525km apart?​

Answers

Answer:

Time taken 4 hrs. 38 minutes

Explanation:

As speed = distance/time interval

So time taken = 4.38

speed=distance/time

we know the speed and we know the distance so we can calculate the time

120km/h=525km/time

time=525km/120km/h=4.375hours or 4 hours and 22 minutes and 30 seconds

Other Questions
_______ es el ancho de banda de la conexin de internet?A. QuinB. Por quC. CundoD. Cul Topic test 25 Q/A (psychology) 100% correct1Q)Maxs attitude toward females playing football is most likely to have been influenced by which of the following factors?1A) social factors 2Q)Recent research indicates that personality development in adulthood does not occur in the stages that Erik Erikson suggested t/f2A)False 3Q)Successful resolution of the intimacy versus isolation stage of adulthood should result in __________.3A)openness 4Q)Gender roles dictate a societys view on applying makeup t/f4A)True5Q)Which of the following statements about cultural variations is true?5A)Individuals living in a culture tend to adapt to cultures and then adapt cultures to suit themselves6Q)In a high context culture, one is very likely to see lots of indicators explicitly expressing the proper and expected behaviors t/f6A)False7Q)One frequent sign of gender inequality in the United States is that women do not ___________.7A)earn as much as men in similar occupations 8Q)The value put on timeliness in the United States is actually a cultural universal in every culture t/f8A)False9Q)Emerging adults are typically financially independent from their parents t/f9A)False10Q)Which is a trend for marriage and having children today as compared to past generations?10A)more people are marrying later and having children later in life11Q)An ethnic identity is primarily composed of a persons race t/f11A)False12Q)In most cultures, the difference between the majority viewpoint and the minority viewpoint is that the majority group is made to feel __________ and the minority group is made to feel __________.12A)normal . . . divergent13Q)Which of the following statements would best express cultural relativism?13A)I wonder why they decided to make food out of worm paste 14Q)Which of the following statements is not true about parenthood?14A)parents or caregivers should not set boundaries for their children 15Q)In general, becoming more cautious in making decisions is a characteristic of which stage of adulthood?15A)late adulthood16Q)An individual in middle adulthood often begins to experience which of the following changes?16A)reflecting on personal mortality 17Q)Successful marriages have all of the following characteristics except __________.17A)good debating skills18Q)Individuals will generally have an easier time establishing a positive ethnic identity if they are from an ethnic group that has much in common with the dominant culture t/f18A)True19Q)Some individuals have difficulty accepting cultures other than their own t/f19A)True20Q)Adults who wish to provide something of value to younger generations are generally more satisfied with their life t/f20A)True 21Q)Which of the following is considered a stressor in a marriage?21A)having financial problems 22Q)Successful resolution of the integrity versus despair stage of adulthood should result in ___________.22A)satisfaction 23Q)One of the characteristics of middle adulthood is peak physical health t/f23A)False 24Q)Each society can have only one culture operating within it at a time t/f24A)False25Q)During the generativity versus stagnation phase, adults feel a need to give back to society, often by raising children t/f25A)True Four less than the product of 2 and a number is the same as negative eightteen. Find the number Tominka use 6 1/9 inches of wire to make a necklace and 3 1/3 of wire to make a bracelet. How many necklaces and bracelet sets can she make if she uses 28 1/3 inches of wire in all? what method is this? Find an equation for the line perpendicular to 4 x + 12 y = 96 and goes through the point ( 3 , 4 ) . Write your answer in the form y = m x + b . a landscape archetiect is hired to build a garden which is of the shape of a right traingle. suppose the architech wants to use a brick wall on the side of AC costing $9/ft and a metal fence on the side costing $3/ft suppose the architect has $1620 budget. what is the maxmum area the architect can build with he budget True or False: An element is a substance that is made up of one type of atom. Given an inequality, what strategies can we use to determine where the boundary line is? Explain your strategies in detail.4x+3y12 what does ene of interest mean ? If the temperature outside increases by 3 1/2 degrees every 1 1/2 hours, by how much will the temperature increase after 4 hours?please answer in fractions.Part 1:What is the rate per hour of the temperature increase?Part 2:How much will the temperature increase after 4 hours? I need help please asap What formed when the subcontinent of South Asia collided with Asia?the Indus RiverB.the Deccan Plateauthe HimalayasDthe Hindu Kush ranges help asap pleaseeee ? :)) Please answer!!!! And show work if possible!!!!! Describe the methods/modes of trade you would use: land, sea, air? Think about how you would seek out trade partners and get your goods where they need to go? Write a paragraph explaining your method of trade, how you would find trade partners and how you would transport your goods. Use the drop-down menu to complete the sentences.During his political campaign, Hitler blamed Jewish people for .In 1925, Hitler outlined his anti-Semitic ideology in .Anti-Semitism can be described as the hatred toward can someone help please 1. The major elements that make up human hair are: Why is the Supreme Court such an important part of the United States government?