Answer:
r56
Explanation:
An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel. The flywheel is a solid disk with a mass of 70.5 kg and a diameter of 1.25 m. It turns on a frictionless axle. Its pulley has much smaller mass and a radius of 0.230 m. If the tension in the upper (taut) segment of the belt is 165 N, and the flywheel has a clockwise angular acceleration of 1.67 rad/s2, find the tension in the lower (slack) segment of the belt.
Answer:
The tension on the slack segment of the belt is 65 N
Explanation:
The given parameters are;
The mass of the solid disk = 70.5 kg
The diameter of the flywheel disk, D = 1.25 m
The radius of the pulley = 0.230 m
If the tension in the upper segment of the belt = 165 N
The angular acceleration of the flywheel = 1.67 rad/s²
The moment of inertia of a circular disc, I = 1/2·M·r²
The radius of the flywheel, r = D/2 = (1.25 m)/2 = 0.625 m
The moment of inertia of the flywheel, I = 1/2 × 70.5 kg × (0.625 m)² = 13.7695312 m²·kg
The moment of inertia, I = 13.7695312 m²·kg
Torque, τ = Moment of Inertia, I × Angular acceleration, α
Torque, τ = I × α
τ = 13.7695312 m²·kg × 1.67 rad/s² = 22.9951171 N·m ≈ 23 N·m
The torque applied from the pulley side is given as follows;
Let [tex]T_{slk}[/tex] represent the tension on the slack segment of the belts, we have;
23 N·m = (165 N - [tex]T_{slk}[/tex]) × 0.230 m
∴ 165 N - [tex]T_{slk}[/tex] = 23 N·m/0.230 m = 100 N
[tex]T_{slk}[/tex] = 165 N - 100 N = 65 N
The tension on the slack segment of the belt, [tex]T_{slk}[/tex] = 65 N
The tension on the slack segment of the belt is 65 N
What is flywheel?flywheel, heavy wheel attached to a rotating shaft so as to smooth out delivery of power from a motor to a machine. The inertia of the flywheel opposes and moderates fluctuations in the speed of the engine and stores the excess energy for intermittent use.
The given parameters are;
The mass of the solid disk = 70.5 kg
The diameter of the flywheel disk, D = 1.25 m
The radius of the pulley = 0.230 m
If the tension in the upper segment of the belt = 165 N
The angular acceleration of the flywheel = 1.67 rad/s²
The moment of inertia of a circular disc, I = 1/2·M·r²
The radius of the flywheel, r = D/2 = (1.25 m)/2 = 0.625 m
Now we will calculate tension on the slack side
The moment of inertia of the flywheel,
[tex]I = \dfrac{1}{2} \times 70.5 kg \times (0.625 m)^2 = 13.7695312 \ m^2 \ kg[/tex]
The moment of inertia, I = 13.7695312 m²·kg
Torque, τ = Moment of Inertia, I × Angular acceleration, α
Torque, τ = I × α
τ = [tex]13.7695312 \times 1.67 = 22.9951171 Nm = 23 Nm[/tex]
The torque applied from the pulley side is given as follows;
Let represent the tension on the slack segment of the belts, we have;
23 N·m = (165 N - ) × 0.230 m
∴ 165 N - = 23 N·m/0.230 m = 100 N
= 165 N - 100 N = 65 N
The tension on the slack segment of the belt, = 65 N
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Lamar writes several equations trying to better understand potential energy. What conclusion is best supported by lamar's worm?
Complete question is;
Lamar writes several equations trying to better understand potential energy. What conclusion is best supported by Lamar’s work?
A) The elastic potential energy is the same for any distance from a reference point.
B) The gravitational potential energy equals the work needed to lift the object.
C) The gravitational potential energy is the same for any distance from a reference point.
D) The elastic potential energy equals the work needed to stretch the object
Answer:
B) The gravitational potential energy equals the work needed to lift the object.
Explanation:
In physics, we know that potential energy is the energy of a body at rest while the energy of a body in motion is known as kinetic energy.
However,the work required to lift a body from it's position of rest is equal to the Gravitational potential energy of that body.
Elastic potential energy is the one that is stored as a result of force applied to deform an elastic object. Thus, it is not equal to the work needed to stretch the object and it is also not the same for any distance from reference point.
Thus, looking at the options, Option B is correct
1) A mass of 20kg was lifted from a height of 5m to 12m. How much work was done?
Answer:
1400joules
Explanation:
work(j)= force × distance.
Distance is from 5m to 12 that is 7m
Force, we weren't given, and the formula is mass × acceleration due to gravity. mass is 20kg and a is 10 or 9.8
f= 20×10
f=200
work= 200 × 7
work= 1400joules
Hope it helped(...and is correct )
Which is a characteristic of the part of the atom marked "A"?Which is a characteristic of the part of the atom marked "A"?Which is a characteristic of the part of the atom marked "A"?Which is a characteristic of the part of the atom marked "A"?Which is a characteristic of the part of the atom marked "A"?
Answer:
its c
Explanation:
just did it
Answer:
c
Explanation:
Which stretch focuses on stretching the glutes and hamstrings while laying on your back?
Question 4 options:
Knee to hip
Bent knee
Knee to Chest
Chest flies
tyyyyyyyy
Answer:
knee to chest
Explanation:
I took the test
Answer:
C. Knee to chest.
which line represnts object moving fastest
**WILL MARK BRAINLEST ANSWER, IF RIGHT**
Line - A: (15/10) = 1.5 inch/second
Line - B: (0/10) = 0
Line - C: (10/10) = 1.0 inch/second
Line - D: (-25/20) = -1.25 inch/second
Line-A represents the greatest speed.
A 12-kg sled is moving at a speed of 3.0 m/s. At which of the following speeds will the sled have twice as much kinetic energy?
What does "the following" mean ?
Kinetic energy is directly proportional to speed² .
So kinetic energy doubles if the speed is increased by √2 .
(3 m/s) · (√2) = 4.243 m/s
A train A travelled a distance of 150 km in 3 hours, whereas, train 'B"
travelled a distance of 180 km in 4 hours. Which train travelled faster?
Answer:
Therefore, Train A is faster with 50km/h and a 5km/h difference
Explanation:
train A
150km/3h = 50km/h
train B
180km/4h = 45km/h
Write a paragraph describe the desert biome
Answer:
The desert biome is an ecosystem that forms due to the low level of rainfall it receives each year. Deserts cover about 20% of the Earth. There are four major types of desert in this biome - hot and dry, semiarid, coastal, and cold. They are all able to inhabit plant and animal life that are able to survive there. Although the daytime temperatures of the desert biome are very hot, they can get very cold at night. The Sahara Desert is the largest desert in the desert biome. It covers over 300 million square miles.
Explanation:
A golf club with mass 0.5 kg is swung at 23 m/s toward a stationary golf ball on a tee. The club barely slows down to 17 m/s, but the ball flies off the tee at 69 m/s. Calculate the mass of the golf ball in kg. Answer to 4 decimals. Help fast please. Will mark brainliest
Answer:
I gotchu fam. 0.0435 kg
Explanation:
m1v1+m2v2=m1v1f+m2v2f
(0.5)(23)+(m2)(0)=(0.5)(17)+(m2)(69)
11.5=8.5+69m2
3=69m2
0.0435 kg
what are the 5 forces in science?
Applied Force.
Gravitational Force.
Normal Force.
Frictional Force.
Air Resistance Force.
Answer:
Gravity, Electromagnetism, Weak Interaction, Strong Interaction, Unifying the Fundamental Forces.
Explanation:
The parallel plates in a capacitor, with a plate area of 8.00 cm2 and an air-filled separation of 2.70 mm, are charged by a 8.70 V battery. They are then disconnected from the battery and pulled apart (without discharge) to a separation of 6.80 mm. Neglecting fringing, find (a) the potential difference between the plates, (b) the initial stored energy, (c) the final stored energy, and (d) the work required to separate the plates.
Answer:
a) ΔV₁ = 21.9 V, b) U₀ = 99.2 10⁻¹² J, c) U_f = 249.9 10⁻¹² J, d) W = 150 10⁻¹² J
Explanation:
Let's find the capacitance of the capacitor
C = [tex]\epsilon_o \frac{A}{d}[/tex]
C = 8.85 10⁻¹² (8.00 10⁻⁴) /2.70 10⁻³
C = 2.62 10⁻¹² F
for the initial data let's look for the accumulated charge on the plates
C = [tex]\frac{Q}{\Delta V}[/tex]
Q₀ = C ΔV
Q₀ = 2.62 10⁻¹² 8.70
Q₀ = 22.8 10⁻¹² C
a) we look for the capacity for the new distance
C₁ = 8.85 10⁻¹² (8.00 10⁻⁴) /6⁴.80 10⁻³
C₁ = 1.04 10⁻¹² F
C₁ = Q₀ / ΔV₁
ΔV₁ = Q₀ / C₁
ΔV₁ = 22.8 10⁻¹² /1.04 10⁻¹²
ΔV₁ = 21.9 V
b) initial stored energy
U₀ = [tex]\frac{Q_o}{ 2C}[/tex]
U₀ = (22.8 10⁻¹²)²/(2 2.62 10⁻¹²)
U₀ = 99.2 10⁻¹² J
c) final stored energy
U_f = (22.8 10⁻¹²) ² /(2 1.04 10⁻⁻¹²)
U_f = 249.9 10⁻¹² J
d) the work of separating the plates
as energy is conserved work must be equal to energy change
W = U_f - U₀
W = (249.2 - 99.2) 10⁻¹²
W = 150 10⁻¹² J
note that as the energy increases the work must be supplied to the system
whenever velocity increases the kinetic energy will ?
Answer:
It will increase.
Explanation:
Because kinetic energy is proportional to the square of the velocity, when velocity is doubled, kinetic energy is quadrupled. Kinetic energy K=mv^2/2
Sheila weighs 60 kg and is riding a bike. Her momentum on the bike is 340 kg • m/s. The bike hits a rock, which stops it completely and throws Sheila forward onto the pavement. If there is no net force on the system, what is Sheila's velocity immediately after she is thrown from the bike? 1.8 m/s 2.0 m/s 5.0 m/s 5.7 m/s
Answer:
v₂ = 5.7 m/s
Explanation:
We will apply the law of conservation of momentum here:
[tex]Total\ Initial\ Momentum = m_{1}v_{1} + m_{2}v_{2}\\[/tex]
where,
Total Initial Momentum = 340 kg.m/s
m₁ = mass of bike
v₁ = final speed of bike = 0 m/s
m₂ = mass of Sheila = 60 kg
v₂ = final speed of Sheila = ?
Therefore,
[tex]340\ kg.m/s = m_{1}(0\ m/s) + (60\ kg)v_{2}\\v_{2} = \frac{340\ kg.m/s}{60\ kg}\\\\[/tex]
v₂ = 5.7 m/s
Answer:
5.7 I got it right on edg 2021
Explanation:
What is the equivalent resistance of a circuit that contains four 75.0 resistors connected in parallel with a 100.0 V battery?
Answer:
18.75 ohms.
Explanation:
From the question,
]When four resistors are connected in parallel in a circuit,
The equilvalent resistor is given as
1/R' = 1/R₁+1/R₂+1/R₃+1/R₄............................Equation 1
Where R' = Equivalent resistor.
Given: R₁ = R₂ = R₃ = R₄ = 75.0 ohms.
Substitute these values into equation 1
1/R' = (1/75)+(1/75)+(1/75)+(1/75)
1/R' = 4/75
R' = 75/4
R' = 18.75 ohms.
Hence the equivalent resistance = 18.75 ohms.
Answer:
18.8 ohms
Explanation:
apax
How is blue colour made?
Answer:
In terms of the light spectrum, blue is a primary color, which means that it is one of the base colors that exist in the universe and it cannot be created by combining different colors together. The primary pigment colors are cyan, magenta, and yellow. Cyan absorbs red, yellow absorbs blue, and magenta absorbs green.
Explanation:
Hope this helped Mark BRAINLEST!!!
A student in your class whom you kind-of like asks you come to watch a meteor shower. What exactly are you being invited to? a. something your mom would not approve of, involving streams of dirty water b. the closest approach of an active bright comet to the Earth c. a once-in-a-lifetime experience at the end of which you will be completely covered with dust particles from space d. watching the left-over dirt from a comet burn up by friction as the pieces hit the Earth's atmosphere e. something quite dangerous where you are likely to be hit when many larger rocks fall from above Submit Your Answer
Answer:D. Watching the left-over dirt from a comet burn up by friction as the pieces hit the Earth's atmosphere
Explanation: A meteor shower is giant rocks moving across the sky
There must be an invitation for d. watching the left-over dirt from a comet burn up by friction as the pieces hit the Earth's atmosphere
What is a Meteor showers ?
Meteor showers occur when dust or particles from asteroids or comets enter Earth's atmosphere at very high speed. When they hit the atmosphere, meteors rub against air particles and create friction, heating the meteors. The heat vaporizes most meteors, creating what we call shooting stars
hence correct option will be D) Watching the left-over dirt from a comet burn up by friction as the pieces hit the Earth's atmosphere
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Why is the air temperature shown on Sensor 4 different from Sensor 5, even though they are at the same latitude?
Answer:
Hello your question lacks some information but i will give you a more General answer about differences in temperature of bodies on same latitude
answer : Continentality is the reason
Explanation:
Sensors or objects on the same latitude are supposed to have the same air temperatures but in some cases this might not be true. This is because of the proximity of the bodies to an Ocean or any water body.
Areas close to water bodies experience modest temperatures even if they are on the same latitude with Areas experiencing harsh temperatures. This effect is termed as Continentality
Un automóvil viaja a la velocidad de 10 m/s. Se acelera Durante 12s y aumenta su velocidad hasta 70 m/s ¿Que aceleración experimenta el automóvil?
Answer:
Aceleracion = 5 m/s²
Explanation:
Dados los siguientes datos;
Velocidad inicial = 10 m/s
Velocidad final = 70 m/s
Tiempo, t = 12 segundos
Para encontrar la aceleración;
Aceleración se puede definir como la tasa de cambio de la velocidad de un objeto con respecto al tiempo.
Esto simplemente significa que la aceleración viene dada por la resta de la velocidad inicial de la velocidad final a lo largo del tiempo.
Por lo tanto, si restamos la velocidad inicial de la velocidad final y la dividimos por el tiempo, podemos calcular la aceleración de un objeto. Matemáticamente, la aceleración viene dada por la fórmula;
[tex] Aceleracion = \frac{final \; velocidad - inicial \; velocidad}{tiempo}[/tex]
Sustituyendo en la fórmula, tenemos;
[tex] Aceleracion = \frac{70 - 10}{12}[/tex]
[tex] Aceleracion = \frac{60}{12}[/tex]
Aceleracion = 5 m/s²
What volume of silver metal will have a mass of exactly 2.5 kg, given that the density of silver is 10.5 g/cm3? (Hint: Note the units of mass given and the units of density.)
Answer:
238.09 cm^3
Explanation:
V=mass/density
V=2500/10.5
V=238.09 cm^3
Also, I need the answer in like 5 mins. This is kinda hard for me can someone help me. It's about the solar system.
Answer:
North star, its close to our solar system but not in it. hope this helps
A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. He is closer to one cliff than to the other. He fires a gun and, after a while, hears three echoes. The second echo arrives 2.1 s after the first, and the third echo arrives 0.5 s after the second. Assuming that the speed of sound is 343 m/s and that there are no reflections of sound from the ground, find the distance between the cliffs. 445.9 Incorrect: Your answer is incorrect. m
Answer:
531.65 m
Explanation:
Let d₁ be the distance between the hunter and the closer cliff and d₂ be the distance between the hunter and the farther cliff. The speed of sound v = 343 m/s.
t₁ is the time taken for the sound to reach the neared cliff and return back to the hunter as echo. Hence:
t₁ = 2d₁/343
t₂ is the time taken for the sound to reach the farther cliff and return back to the hunter as echo. Hence:
t₂ = 2d₂/343
t₂ - t₁ = 2.1
2d₂/343 - 2d₁/343 = 2.1
d₂ - d₁ = 360.15 (2)
t₃ is the time taken by the third echo as a result of the second echo reaching the nearer cliff. Hence:
t₃ = 2d₁/343
0.5 = 2d₁/343
d₁ = 85.75 m
d₂ - d₁ = 360.15
d₂ - 85.75 = 360.15
d₂ = 445.9 m
The distance between the two cliffs = d₁ + d₂ = 445.9 + 85.75 = 531.65 m
what affects the strength of an electric field? FOR SCIENCE
Answer:
The electric field strength is dependent upon the quantity of charge on the source charge (Q) and the distance of separation (d) from the source charge.
please help me im struggling
Answer:
right
Explanation:
PLZ HELP ILL GIVE BRAINLIEST
Answer:
x10 - 6 +(8+6-4)= 10
10m -10x y0
water flows in a pipe of a terminal of A1=0.02 m2 with a speed of V1=2 m/s. At the second end of the pipe A2=0.04 m2, the speed of flow is V2=_______m/s
Which of the following statements is correct A. College degree isn't as important as it was in the past b. Over time, I can earn more money by not going to college c. College graduates earn about double the income of high school graduates d. The money I make after college does not compensate for the four years I spent in college
Answer:
I'd say C is the answer they want, though my pedantic side wants to argue for B being true as well.
Answer: C. College graduates earn about double the income of high school graduates.
Explanation: I just took the quiz :)
A stone of mass 0.2kg is thrown vertically upwards from the ground with a velocity of 20m/s. Find the maximum height attained by the stone
Answer: 20.4 m
Explanation: speed v upward is v = vo -gt.
When maximum height v = 0, vo -gt = 0 and
T = vo / g = 20 m/s / 9.81 m/s² = 2.04 s
Now height y = vot -0.5 gt^2 = 20,4 m
This is possible to solve using
Conservation of energy Ek= Ep
0.5mv² = mgh. And h = v²/2g. Results same
A 12 kg object has a velocity of 37.5 m/s. What is its momentum
Answer:
Solution:
Explanation:
Here, mass of body ( m)=12kg.
velocity (v)=37.5 m/s. momentum = mass× velocity = 12kg×37.5m/s =450kgm/s ans.
What does it take to change the direction or speed of an object
Answer:
An object's speed or direction can be changed by a force. This means a greater force against a lesser force, and it results in acceleration. This means any push or pull against another equal push or pull. It results in no change of acceleration
Explanation: