1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
netineya [11]
3 years ago
15

Two skydivers are holding on to each other while falling straight down at a common terminal speed of 52.30 m/s. Suddenly, they p

ush away from each other. Immediately after separation, the first skydiver (who has a mass of 89.30 kg) has the following velocity components (with ''straight down'' corresponding to the positive z-axis): v1,x=4.430 m/s v1,y=4.250 m/s v1,z = 52.30 m/s What are the x- and y-components of the velocity of the second skydiver, whose mass is 63.20 kg, immediately after separation?
Physics
1 answer:
zalisa [80]3 years ago
6 0

Answer:

v_{2,x} = - 6.259\ m/s

v_{2,y} = - 6.005\ m/s

Solution:

As per the question:

Common terminal speed, v_{cT} = 52.30\ m/s

Mass of the one of the skydiver, m_{1} = 89.30 kg

Velocity of the skydiver :

v_{1,x} = 4.430\ m/s

v_{1,y} = 4.250\ m/s

v_{1,z} = 52.30\ m/s

Mass of the other skydiver, m_{2} = 63.20 kg

Now,

To calculate the components of velocity along X and Y axes:

Before getting separated, the momentum along X-axis is zero.

After the separation, the momentum along X-axis is zero.

Therefore,

m_{1}v_{1,x} + m_{2}v_{2,x} = 0

89.30\times 4.430 + 63.20\times v_{2,x} = 0

v_{2,x} = - 6.259\ m/s

Now, consider the momentum along Y-axis:

Before separation, momentum = 0

After separation, momentum along Y-axis = 0

Therefore,

m_{1}v_{1,y} + m_{2}v_{2,y} = 0

89.30\times 4.250 + 63.20\times v_{2,y} = 0

v_{2,y} = - 6.005\ m/s

Thus the magnitude of the X and Y component of velocity are 6.259 m/s and 6.05 m/s respectively.

You might be interested in
La superficie de unas botas suman 400 cm2 y la persona que las usa tiene 45 kg de masa, calcula la presión que ejerce sobre el p
liubo4ka [24]

Answer:

11025 N / m²

Explanation:

Los siguientes datos se obtuvieron de la pregunta:

Área (A) = 400 cm²

Masa (m) = 45 Kg

Aceleración por gravedad (g) = 9,8 m / s²

Presión (P) =?

A continuación, determinaremos la fuerza aplicada. Esto se puede obtener de la siguiente manera:

Masa (m) = 45 Kg

Aceleración por gravedad (g) = 9,8 m / s²

Fuerza (F) =.?

F = m × g

F = 45 × 9,8

F = 441 N

A continuación, convertiremos 400 cm² a m². Esto se puede obtener de la siguiente manera:

1 cm² = 0,0001 m²

Por lo tanto,

400 cm² = 400 cm² × 0,0001 m² / 1 cm²

400 cm² = 0,04 m²

Por tanto, 400 cm² equivalen a 0,04 m².

Finalmente, determinaremos la presión ejercida de la siguiente manera:

Área (A) = 0.04 m².

Fuerza (F) = 441 N

Presión (P) =?

P = F / A

P = 441 / 0,04

P = 11025 N / m²

Por tanto, la presión ejercida es 11025 M / m²

4 0
2 years ago
Why do electric field lines explain why like charges repel and opposite charges attract?
vivado [14]

It can be explained as follows: consider the field produced by a positive charge. If we place a positive test charge in this a field, then this charge would move away from the central charge (because like charges repel), while if we place a negative test charge in this field, this charge would move towards the central charge (because opposite charges repel)

Explanation:

Electric fields are vector fields, and they are represented using field lines.

The field lines give indications on both the magnitude and the direction of the electric field. In fact:

  • The magnitude of the field can be inferred from the spacing between the lines: the closer the lines are, the stronger the field, while for a weaker field the lines are more spread apart
  • The direction of the field is given by the direction of the field lines

In particular, by convention the direction of the field lines represent the direction of the force that a positive test charge would feel when immersed in that field: this means that a positive test charge would accelerate in the direction of the field lines, while a negative test charge would accelerate in the direction opposite to the field lines.

This is in agreement with the fact that like charges repel and opposite charges attract. In fact, the lines of the electric field produced by a single-point positive charge point away from the positive charge: if we place a positive test charge in this field, then this charge would move away from the central charge (because like charges repel), while if we place a negative test charge in this field, this charge would move towards the central charge (because opposite charges repel).

Learn more about electric fields:

brainly.com/question/8960054

brainly.com/question/4273177

#LearnwithBrainly

5 0
3 years ago
4. What quantity of heat is required to raise the temperature of 100
kupik [55]

Answer:

Q = 836.4 Joules.

Explanation:

Given the following data;

Mass = 100 grams

Initial temperature = 25°C

Final temperature = 45°C

We know that the specific heat capacity of water is equal to 4.182 J/g°C.

To find the quantity of heat;

Heat capacity is given by the formula;

Q = mcdt

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of water.

dt represents the change in temperature.

dt = T2 - T1

dt = 45 - 25

dt = 20°C

Substituting the values into the equation, we have;

Q = 100*4.182*20

Q = 836.4 Joules.

5 0
3 years ago
A 31 kg crate full of very cute kittens is placed on an incline that is 17° below the horizontal. The crate is connected to a sp
fgiga [73]

Answer:

Explanation:

Change in length of spring = 2.13 m

Component of weight acting on spring = mg sinθ

so

mg sinθ = k x where k is spring constant and x is total stretch due to force on the spring.

Here x = 2.13

mg sin17 = k x 2.13

31 x 9.8 sin17 = k x 2.13

k = 41.7 N/m

b ) In case surface had friction , spring would have stretched by less distance .

It is so because , the work done by gravity in stretching down is stored as potential energy in  spring . In case of dissipative force like friction , it also takes up some energy in the form of heat etc  so spring stretches less.

5 0
3 years ago
As shown in the diagram, two forces act on an object. The forces have magnitudes F1 = 5.7 N and F2 = 1.9 N. What third force wil
galina1969 [7]

Answer:

Second option 6.3 N at 162° counterclockwise from  

F1->

Explanation:

Observe the attached image. We must calculate the sum of all the forces in the direction x and in the direction y and equal the sum of the forces to 0.

For the address x we have:

-F_3sin(b) + F_1 = 0

For the address and we have:

-F_3cos(b) + F_2 = 0

The forces F_1 and F_2 are known

F_1 = 5.7\ N\\\\F_2 = 1.9\ N

We have 2 unknowns (F_3 and b) and we have 2 equations.

Now we clear F_3 from the second equation and introduce it into the first equation.

F_3 = \frac{F_2}{cos (b)}

Then

-\frac{F_2}{cos (b)}sin(b)+F_1 = 0\\\\F_1 = \frac{F_2}{cos (b)}sin(b)\\\\F_1 = F_2tan(b)\\\\tan(b) = \frac{F_1}{F_2}\\\\tan(b) = \frac{5.7}{1.9}\\\\tan^{-1}(\frac{5.7}{1.9}) = b\\\\b= 72\°\\\\m = b +90\\\\\m= 162\°

Then we find the value of F_3

F_3 = \frac{F_1}{sin(b)}\\\\F_3 =\frac{5.7}{sin(72\°)}\\\\F_3 = 6.01 N

Finally the answer is 6.3 N at 162° counterclockwise from  

F1->

7 0
3 years ago
Other questions:
  • A uniform conducting rod of length 34 cm has a potential difference across its ends equal to 39 mV (millivolts). What is the mag
    8·2 answers
  • What is the self-inductance of a solenoid 30.0 cm long having 100 turns of wire and a cross-sectional area of 1.00 × 10-4 m2? (μ
    11·1 answer
  • A car is traveling in a straight path due east with a velocity of 8 meters per second. In a 10 second interval, how many meters
    15·2 answers
  • dopasuj wartości pracy z ramki do przedstawionych sytuacji a następnie wyraź tę pracę w dżulach uwaga jedna wartość pracy nie bę
    15·2 answers
  • When Aditya pushes on Rachel and her bicycle, they accelerate at 0.22 m/s/s. If Aditya pushes on Rachel and her bicycle with twi
    12·1 answer
  • I need the answer for this question
    5·1 answer
  • What is the velocity of a group of explorers traveling from Antarctica to Australia, traveling 1500 miles in 48 hours?31.25 mph
    15·1 answer
  • Convert 365 years to days. Using one step conversion. :) Please help w this
    6·2 answers
  • PLS HELP I NEED ANSWER HOMEWORK DUE SOON
    6·1 answer
  • The process by which solids vaporize without first becoming a liquid is called.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!