If he jumps from the plane with a velocity of +2 ft/s and, after 7 seconds of free fall, he has a velocity of -223ft/s, what is his displacement?

Answers

Answer 1

Answer:

his displacement is 772.85 ft

Explanation:

Given;

initial velocity of his jump, u = 2 ft/s

final velocity of his jump, v = - 223 ft/s

time of motion, t = 7 seconds

acceleration due to gravity, g = 32.17 ft/s²

Let downward motion = positive direction

Let his displacement after 7s = Δh

Apply the following kinematic equation to determine his displacement.

[tex]v^2 = u^2 + 2g\Delta h\\\\(-223)^2 = (2)^2 + (2\times 32.17)\Delta h\\\\49,729 = 4 + 64.34\Delta h\\\\-64.34 \Delta h = 4 - 49,729\\\\-64.34 \Delta h = -49,725\\\\\Delta h = \frac{49,725}{64.34} \\\\\Delta h = 772.85 \ ft[/tex]

Therefore, his displacement is 772.85 ft


Related Questions

PLEASE HELP ME!

1. Figure 5.20 shows a graph of displacement against time for a wave.

(a) What is meant by amplitude?

(b) Determine the period of oscillation, T. Then, calculate the frequency of oscillation.

2. Compare and contrast progressive wave and stationary wave.​

Answers

Answer:

a) A = 3 cm,  b)  T = 0.4 s,   f = 2.5 Hz,

2) A standing wave the displacement of the wave is canceled and only one oscillation remains

Explanation:

a) in an oscillatory movement the amplitude is the highest value of the signal in this case

          A = 3 cm

b) the period of oscillation is the time it takes for the wave to repeat itself in this case

          T = 0.4 s

the period is the inverse of the frequency

         f = 1 /T

         f = 1 /, 0.4

         f = 2.5 Hz

2) a traveling wave is a wave for which as time increases the displacement increases, in the case of a transverse wave the oscillation is perpendicular to the displacement and in the case of a longitudinal wave the oscillation is in the same direction of the displacement.

A standing wave occurs when a traveling wave bounces off some object and there are two waves, one that travels in one direction and the other that travels in the opposite direction. In this case, the displacement of the wave is canceled and only one oscillation remains.

Phecda has a surface temperature of approximately 9500 K and a luminosity of 63. Identify the name of the star found on the Characteristics of Stars chart in the 2011 Edition Reference Tables for Physical Setting/Earth Science that has a surface temperature and luminosity closest to Phecda. a) Deneb b) Rigel c) Sirius d) Pollux

Answers

Answer:

Sirius

Explanation:

On the HR diagram Sirius is the closet.

c) Sirius has a surface temperature and luminosity closest to Phecda

What is surface tension and luminosity of a star ?

Surface temperature is the temperature at or near a surface. Luminosity is an absolute measure of radiated electromagnetic power (light), the radiant power emitted by a light-emitting object over time.

As it can be observed from the graph attached that Sirius have a surface temperature of about 10,000 K which can be considered as closest to 9500 K comparatively to other stars and if we see the the y coordinate of Sirius which is the luminosity representing axis , then Sirius have a value of luminosity closer to 63

hence correct answer is c)Sirius

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what would a permanetly magnetic substance be called

Answers

Answer:

A Permanent magnet or a static magnet

Explanation:

A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic).

Could also be called ferromagnetic !

Brian has an object suspended in the air. It has a mass of 100 kg and is 25 meters above the ground. What is the object’s potential energy?

Answers

Explanation:

the PE = Weight x g x Height above ground where g is the gravitational constant (9.8m/s^2)

so tge PE = 100 x 9.8 x 25 = 24500 J

if the weight of 1kg is 10 N in water what is the density of the stone

Answers

Answer:

I have a screenshot of this.

Explanation:


Two closed organ pipe gives 4 beats when sounded together at 5°C. Calculate the number of beats in 35°C​

Answers

Answer:

The number of beats is 10.58 in 35°C.

Explanation:

The beat frequency is given by : f₁-f₂

At 5°C, f₁-f₂ = 4

We need to find the number of beats in 35°C​.

The frequency in a standing wave is proportional to [tex]\sqrt T[/tex].

So,

[tex]\dfrac{f_1-f_2}{f_1'-f_2'}=\dfrac{\sqrt {T}}{\sqrt{T'}}\\\\f_1'-f_2'=(f_1-f_2)\times \dfrac{\sqrt{T'}}{\sqrt{T}}\\\\f_1'-f_2'=4\times \dfrac{\sqrt{35}}{\sqrt{5}}\\\\f_1'-f_2'=10.58[/tex]

So, the number of beats is 10.58 in 35°C.

when we put our finger in front a a lit flashlight, light appears to pass through our finger when seen on a wall,how?

Answers

Answer:

diffraction phenomenon

Explanation:

When you place your finger in front of a flash, you have a diffraction phenomenon whereby the light fills a part of the space with the first maximum diffraction.

In this case the phenomenon of geometric optics cannot explain the process of bending the beam around an object.

(2²)⁴pepelelellelrle​

Answers

2^8, 2 to the 8th power , applying laws of exponents you have to multiply 2 times 4

Mike roller skates with a constant speed of 10 miles per hour. How long will he take to travel a distance of 15 miles.

Answers

Answer:

So every hour he makes 10 miles.  So he would take 1 and a half hours to go to Mcdonalds 15 miles away.

Explanation:

[tex]\huge\boxed{{\textsf{90 minutes}}}[/tex]

We know that Mike's speed is [tex]\dfrac{10\ \text{miles}}{60\ \text{minutes}}[/tex] since there are [tex]60[/tex] minutes in an hour, and we know that MIke needs to travel [tex]15[/tex] miles. We'll model this using fractions:

[tex]\dfrac{10\ \text{miles}}{60\ \text{minutes}}=\dfrac{15\ \text{miles}}{x\ \text{minutes}}[/tex]

We can see that there is a [tex]2:3[/tex] ratio here, so we'll divide the left fraction by [tex]2[/tex] and multiply it by [tex]3[/tex] to get the right fraction.

[tex]\dfrac{10}{60}\Rightarrow\dfrac{5}{30}\Rightarrow\dfrac{15\ \text{miles}}{\boxed{90\ \text{minutes}}}[/tex]

Ocean zones can be classified based on distance from Shore into intertidal,
costal ocean, and open oceans.
True or false ?

Answers

Answer:

I think true

Explanation:

I hope I'm right and I hope it helps

Answer:

true

Explanation:

basta yun yung sagot ko

Magali exerts a force of 4.5 N to slide her Blackberry across the table (so she can hide it from Hina!). If she does 2.7 J of work in the process, how far has the Blackberry moved?

Answers

Work is equal to the magnitude of the force multiplied by the displacement x. Assuming Magali is pushing the phone, so that the force and displacement point in the same direction, then the work done is positive, and

2.7 J = (4.5 N) x   ==>   x = (2.7 J) / (4.5 N) = 0.60 m

Even if she was pulling the phone instead, the displacement would be the same, but the work done would be negative and the force would point in the opposite direction, thus also having a negative sign:

-2.7 J = (-4.5 N) x   ==>  x = 0.60 m

Humans are not the only animals that pollute the air Please select the best answer from the choices provided
Тure
False​

Answers

Answer:

It is True that Humans are not the only animals that pollute the air.

True

Every animal exhales CO2, that's why they pollute the air too, except that it is much less than that of humans.

A motor does a total of 480 joules of work in 5.0 seconds to lift a 12-kilogram block to the top of a rampThe average power developed by the motor is

Answers

Answer:

there it is fella

we neglect the mass data

Con respecto a las magnitudes longitud del péndulo y periodo, ¿por qué la línea de mejor ajuste de los puntos-dato de la distribución indica que sí hay relación entre ambas magnitudes?

Answers

Answer:

Por que existe una relación entre dichas magnitudes.

Para un pendulo perfecto de largo L, sabemos que el periodo esta definido como:

[tex]T = 2*\pi *\sqrt{L/g}[/tex]

Donde:

pi = 3.14

L = largo del péndulo

g = aceleración gravitatoria = 9.8 m/s^2

Entonces podemos ver que el periodo es proporcional a la raíz cuadrada de la longitud del péndulo.

Esto es por lo que al analizar datos de un experimento se debería observar una relación entre esas magnitudes.

If the distance between two objects is increased to four times the original distance.how will that increase change the force of attraction between the object

Answers

Answer:

Gravitational force becomes sixteen times lesser. The strength of the gravitational force between two objects is dependent on their mass. Gravitational force will be weaker if the objects move further away from each other.

This was used to solve for the gravitational force,

G = gravitational constant

m = mass of the first object

M = mass of the second object

d = distance between the two objects

[G * (m*M) / 16d^2] = 1/16

The atomic number of a nucleus decreases during which nuclear reactions?

Answers

A related type of beta decay actually decreases the atomic number of the nucleus when a proton becomes a neutron. Due to charge conservation, this type of beta decay involves the release of a charged particle called a “positron” that looks and acts like an electron but has a positive charge.

a student places 8 similar coins in a pile . the height of the pile of coins is 2.4 cm calculate the average thickness of one coin

Answers

Answer:

0.3 cm

Explanation:

[tex] \frac{2.4}{8} \\ = 0.3[/tex]

What is cerebellum ?

Answers

The portion of the brain in the back of the head between the cerebrum and the brain stem. The cerebellum controls balance for walking and standing, and other complex motor functions. I hope it helped??

Suggest two ways in which the boy could balance the beam?

Answers

Answer:

Hope this is what you were looking for!

Explanation:

1) So, if we are talking about balancing a straight stick (beam), he could put a finger from each hand on either side of it and move them together. As a result of friction his fingers will meet at the balance point.

2) Method of trial and error.

He can balance it on his hand or look for something that can handle the weight of it

The lower the pH number is, the more ______ the solution.

Answers

Answer:

more acidic (less base)

hope this helps! :)

Spaceship 1 and Spaceship 2 have equal masses of 150 kg. Spaceship 1 has an initial momentum magnitude of 900 kg-m/s. What is its initial speed?
A. 9 m/s
B. 6 m/s
C. 90 m/s
D. 60 m/s

Answers

Answer:

ans: 6 m/s

Explanation:

spaceship 1 has mass= 150kg

initial momentum of spaceship 1 = 900 kg•m/s

we know,

momentum = mass × velocity

so,

velocity = momentum/mass

= 900 / 150

= 6 m/s

since we know it was initial momentum so, velocity is initial speed,

Arches National Park is a desert landscape located in Utah. The park is filled with arches that have been formed by nature. The arches were once solid rock. Over time, extreme temperature changes and windy conditions have caused pieces of rock to crumble and blow away, leaving holes in the rock and forming the arches. Which of these processes is responsible for the formation of the arches?


a.cooling magma


b.weathering and erosion


c.compaction and cementation


d.increased geological pressures

Answers

a is the answer cooling magma

Which car safety features absorb kinetic energy?
A. Seat belts and air bags

B. Seat belts and crumple zones

C. Seat belts, crumple zones and air bags

Answers

Answer:

C

Explanation:

Seat belts absorb kinetic energy when a car crashes because it pulls you back from falling forward given the kinetic energy (and momentum) you had before the crash.

Air bags absorb kinetic energy when a car crashes because it pushes you back from falling forward given the kinetic energy (and momentum) you had before the crash.

Crumple zones absorb kinetic energy when a car crashes because it provides a cushion when the cars crash. Kind of like dropping your phone into a pillow.

I hope this helps! :)

Answer:

C. Seat belts, crumple zones and air bags

Explanation:

All of these car safety features absorb kinetic energy, including seat belts, crumple zones and air bags.

Un automóvil se anuncia con una potencia de 600 hp y cuando se prueba en una subida pesada, alcanza una velocidad máxima de 45 km/h ¿cuál es la fuerza máxima que le imprime el motor?

Answers

Answer:

The force is 35808 N.

Explanation:

Power, P = 600 hp = 600 x 746 W = 447600 W

speed, v = 45 km/h = 12.5 m/s

Let the force is F.

P = F v

447600 = F x 12.5

F = 35808 N

Señala cual de las siguientes propiedades de una sustancia son propiedades características= masa densidad volumen belleza conductividad eléctrica

Answers

Answer:

i) densidad

ii) conductividad eléctrica

Explanation:

Las propiedades características de una sustancia se denominan también propiedades intrínsecas. Estas son propiedades que no dependen de la cantidad de sustancia presente.

Las propiedades características se pueden utilizar para identificar una sustancia porque son propiedades que siempre debe exhibir la sustancia.

Entre las opciones, podemos encontrar las siguientes sustancias características;

i) densidad

ii) conductividad eléctrica

what is the mathematical relationship among voltage current and resistance​

Answers

Answer:

The relationship between voltage, current, and resistance is described by Ohm's law. This equation, i = v/r, tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r.

explain the derivation of Newton's third and second law.​

Answers

Let FAB, be the force exerted on body B by body A and FBA be the force exerted by body B on A. Suppose that due to these forces FAB and FBA, dp1/dt and dp2/dt be the rate of the change of momentum of these bodies respectively.

Answer:

Consider an isolated system of 2 bodies A & B. An isolated system means where there is no external force acting.Now let F be the force acting on B by A & F be the force acting on A by B.Now rate of change of momentum of A =dpA/dt and rate of change of momentum of B =d pB/dt

thus FAB=d pB/dt (i)......

FBA=dpA/dt (ii)........

Adding 1 and 2 we get FAB+FBA=d pB/dt+dpA/dt =d(pB+pA)/dt

But if no force is applied momentum will also be 0 because no velocity will be there so rate of change of momentum will also be 0

thus d(pA+pB)/dt=0

therefore FAB+FBA=0

or,FAB=-FBA

(3RD LAW OF MOTION)

The speed of light in vinegar is 2.30 x 10^8 m/s. Determine the index of refraction. (2​

Answers

Answer:

[tex]n _{v} = \frac{c}{v} \\ = \frac{3 \times {10}^{8} }{2.30 \times {10}^{8} } \\ = 1.30[/tex]

This question involves the concept of refractive index.

The refractive index of the vinegar is "1.3".

What is the Refractive Index?

The refractive index is defined as the ratio of the speed of light in air and the speed of light in the given medium which is vinegar here.

[tex]\eta = \frac{c}{v}[/tex]

where,

[tex]\eta[/tex] = refractive index = ?c = speed of light in air = 3 x 10⁸ m/sv = speed of light in vinegar = 2.3 x 10⁸ m/s

Therefore,

[tex]\eta = \frac{3\ x\ 10^8\ m/s}{2.3\ x \10^8\ m/s}[/tex]

η = 1.3

Learn more about refractive index here:

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If a wire with current 5.0A has 12 coulombs of charge pass through it how much has passed

Answers

Answer:

2.4 secs.

Explanation:

Current (A) = Charge (coulomb)/Time(sec)

We are looking for time. So:

Time (sec) = Charge (coulomb)/Current (A)

12coulombs/5.0A = 2.4 secs

A puppy finds a rawhide bone and begins to pull it with a force, Ft. The free-body diagram is shown.


Which describes what happens to the bone?

Answers

Answer:

it begins to move to the right! :)

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