A body rolls over a horizontal, smooth surface without slipping with a translational
kinetic energy E. Show that the kinetic energy of the body is E=(1+K 2 /R 2 )
where K is the radius of gyration and R is the radius of the body. Using the above relation, find the
total kinetic energy of a circular disc.
b) A wheel of mass 1000 kg and radius 1 m is rotating at the rate of 420 r.p.m. What is the
constant torque required to stop the wheel in 14 rotations, assuming the mass to be
concentrated at the rim of the wheel?

Answers

Answer 1

Answer:

I am not sure sorry wish I could help

Answer 2

Answer:

I also wish I could help u but am sorry I don't know it

Don't worry you will find a solution


Related Questions

What magnification is best for the observation of most tissue slides? Explain why this has proved to be true?

Answers

Answer:

The 10X objective is use for the identification of actual size of histology tissues and 4X magnification is best for observation of most tissues slides

Explanation:

4X magnification is best for observation of most tissues slides because it has an objective lens that have lower power and have great high field overview which make it very easier to locate specimens on the slide. It is use to get the overview of histology slides. It is use to showcase more detailed observations about histology.

The 40X objective is use majorly to identify tissue , to observe the finer details and study tissue organization on the histology slide.

A
6N
11 N
What is the net force ?

Answers

Answer:

66n

Explanation:

4376

Answer and i will give you branilest

Answers

Answer:

nice cool math and jim jake jr as a baby and just jim jake baby and nice pfp d00d XD

Explanation:

A 75 kg man stands in an elevator. What will be the force that the elevator exerts on him when
a) the elevator is at rest? ;
b) the elevator is moving upwards with a uniform acceleration of 3.2 m/s"?
c) moving downwards with an acceleration of 2.0 m/s ?

Answers

Answer:

a is the answer I think so

a ball is thrown downward with an initial speed of 7 m/s. the ball's velocity after 3 seconds is ____ m/s (g= -9.8m/s^{2}

Answers

The speed downwards is 7 + (3*9.8)
7+ 29.4 = 36.4 m/s

7. An auto's velocity increases uniformly from 3m/s to 25m/s while
covering 90m. Calculate the acceleration. *

Answers

Answer:

  3.422 m/s^2

Explanation:

A useful relation is ...

  v2^2 -v1^2 = 2ad

  (25 m/s)^2 -(3 m/s)^2 = 2a(90 m)

  (616 m^2/s^2)/(180 m) = a ≈ 3.422 m/s^2

The acceleration is about 3.422 m/s^2.

Which is one property of coal that makes it ideal for use in a power plant?
It burns easily.
It makes ash.
It is renewable.
It contains mercury.

Answers

Answer:

It burns easily & It produces a lot of energy

Explanation:

Coal burns easily and thus is ideal for use in a power plant.  

• To generate electric power in the United States, the main fuel used is coal.  

• It is used as it is burned easily and thus producing enormous amount of energy.  

• In the power plants, the lignite, bituminous coal, or subbituminous coal is burned.  

• The heat generated by the burning of the coal is used to transform water into high pressure steam that mediates a turbine, which generates electricity.  

• About 23 percent of the electricity in the United States is produced by the burning of coal.  

Thus, the correct answer is that coal burns easily.

To know more about:

https://brainly.com/question/3715778

Your cousin has looked after you your whole life and you always looked up to him. Today he told you he sells drugs; " That's where I get all the money for clothes and stuff. " He asked, Do you want to go into business with me you will make great money?" What do you do/say to him? Use the decision-making process. *

Answers

Answer:

Honestly, you should have a firm resolve not to go into drug peddling.

Politely tell him you are not interested in the business, that you are most concerned about your future and the career path you have chosen for yourself already.

He will definitely feel bad, but you can go on to advise him.

You can also advise him to stop and highlight the dangers of doing drugs.

Explanation:

There are a whole lot of disadvantages involved in the drug business,

in fact, the disadvantages out weights the advantages in the long run.

say if one is caught and sent to a life long sentence, or if one is caught up with the effect of the use of hard drugs and the health implication, to the extent that one looses his/her sanity, you see it won't make any sense anymore doing drugs in the long run. so friend you can advise you cousin to stop and thinker of good businesses that cold fetch him cool money, without the law chasing him, with that he can be a contributor to economic growth by paying his taxes too

if you apply force on an object such as a ball, what will possibly happen to it?​

Answers

It will move in the direction you pushed it, but it will go at a certain velocity

Question 10 of 25
In recent years, assistive technologies have been developed to give people
with disabilities equal access to resources. Examples include wheelchair
ramps, voice-recognition software, and screen readers. Which statement best
explains how societal demand guided the development of these
technologies?
A. Engineers developed assistive technologies first and then began a
public-awareness campaign to educate people on how the
technologies can be used to provide equal access.
B. Businesses recognized the lack of equality for people with
disabilities and lobbied the government to make laws that required
the implementation of assistive technologies.
C. When new assistive technologies became available, consumers
began to demand their inclusion in all places of business,
D. Engineers developed and improved solutions in response to
consumer demand for equal access for people with disabilities.

Answers

Answer:engineers developed and improved solutions in response to consumer demand for equal access for people with disabilities.

Explanation:

Apex

Which parts of the warm-up did you find most difficult? Why?

Answers

Answer:

Can't really answer that for now. More context please?

Explanation:

I will answer it in a comment when you give some context.

hi! we need more info to solve.

sorry

A man throws a ball straight up to his friend on a balcony who catches it at its highest point. The ball was thrown with an initial velocity of 17.9 m/s2. What height does the ball reach?

Answers

Answer:

The maximum height reached by the ball is 16.35 m.

Explanation:

Given;

initial velocity of the ball, u = 17.9 m/s

the final velocity of the ball at the maximum height, v = 0

The maximum height reached by the ball is given by;

v² = u² + 2gh

During upward motion, gravity is negative

v² = u² + 2(-g)h

v² = u² -  2gh

0 = u² -  2gh

2gh = u²

h = u² / 2g

h = (17.9)² / (2 x 9.8)

h = 16.35 m

Ttherefore, the maximum height reached by the ball is 16.35 m.

PICTURE ABOVE !
What could the mother do to make sure each of her kids follows her "cookie rule"?

Answers

Answer:

she should ve the one handing out the cookies each day, to make sure each child gets only one cookie a day.

I WILL MARK YOU AS BRAINLIEST IF RIGHT
You fall off the top of the Sears Tower and begin accelerating 9.8 m/s^2 toward the ground. If you fall for 10 seconds, how fast will you be going when you hit the ground ?

Answers

Answer:

Falling from the Sears Tower

• After 5 seconds, the ball falling from the

Sears Tower will have fallen

distance = ½ • 32 ft/s2 • (5 s)2 = 16 • 25

= 400 feet.

• We can turn the formula around to figure

out how long it would take the ball to fall all

the way to the ground (1450 ft)

Ætime = square root of (2 x distance/g)

Explanation:

In theory you would be travelling with 10x9.8 = 98 m/s. In practice air resistance will be such that you will not accelerate to that speed. You would possibly reach terminal velocity after a few seconds, depending on your weight, size, and your body shape as you fall...

what formula do I use?​

Answers

Explanation:

(a) Given:

Δy = 0 m

v₀ᵧ = 20.0 m/s sin 53° = 16.0 m/s

aᵧ = -9.8 m/s²

Find: t

Use an equation that doesn't include final velocity, v.

Δy = v₀ᵧ t + ½ aᵧt²

0 m = (16.0 m/s) t + ½ (-9.8 m/s²) t²

0 = 16t − 4.9t²

0 = t (16 − 4.9t)

t = 3.26 s

(b) Given:

v₀ₓ = 20.0 m/s cos 53° = 12.0 m/s

aₓ = 0 m/s²

t = 3.26 s

Find: Δx

Use an equation that doesn't include final velocity, v.

Δx = v₀ₓ t + ½ aₓt²

Δx = (12.0 m/s) (3.26 s) + ½ (0 m/s²) (3.26 s)²

Δx = 39.24 m

(c) Given:

v₀ᵧ = 20.0 m/s sin 53° = 16.0 m/s

vᵧ = 0 m/s

aᵧ = -9.8 m/s²

Find: Δy

Use an equation that doesn't include t.

vᵧ² = v₀ᵧ² + 2aᵧ Δy

(0 m/s)² = (16.0 m/s)² + 2 (-9.8 m/s²) Δy

Δy = 13.02 m

Alternatively, use t/2 = 1.63 seconds, and use an equation that doesn't include the final velocity, v.

Δy = v₀ᵧ t + ½ aᵧt²

Δy = (16.0 m/s) (1.63 s) + ½ (-9.8 m/s²) (1.63 s)²

Δy = 13.02 m

2. A carpenter tosses a shingle off a 9.4 m high roof, giving it an initial horizontal
velocity of 7.2 m/s.
(a) What is the final vertical velocity of the ball?
(b) How long does it take to reach the ground?
(c) How far does it move horizontally in this time?

Answers

Sounds like the shingle/ball is thrown from the roof horizontally, so that the distance it travels x after time t horizontally is

x = (7.2 m/s) t

The object's height y at time t is

y = 9.4 m - 1/2 gt²

where g = 9.80 m/s² is the magnitude of the acceleration due to gravity, and its vertical velocity is

v = -gt

(a) The object hits the ground when y = 0:

0 = 9.4 m - 1/2 gt²

t² = 2 * (9.4 m) / (9.80 m/s²)

t ≈ 1.92 s

at which time the object's vertical velocity is

v = -g (1.92 s) = -18.8 m/s ≈ -19 m/s

(b) See part (a); it takes the object about 1.9 s to reach the ground.

(c) The object travels a horizontal distance of

x = (7.2 m/s) * (1.92 s) ≈ 13.8 m ≈ 14 m

The average speed and kinetic energy of the particles in a gas are proportional to the measured what of the gas

Answers

Answer: Temperature

Explanation:

The average kinetic energy of the particles in a gas is proportional to the temperature of the gas. Because the mass of these particles is constant, the particles must move faster as the gas becomes warmer.

What is kinetic energy?

"The kinetic energy of an object is the energy that it possesses due to its motion."

What is average kinetic energy?

"The product of the half of the mass of each gas molecule and the square of RMS speed."

Know more about average kinetic energy here

https://brainly.com/question/1599923

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Explain period motion of oscillatory body. ​

Answers

Answer:

motion repeating itself is referred to as periodic or oscillatory motion. An object in such motion oscillates about an equilibrium position due to a restoring force or torque. ... This motion is important to study many phenomena including electromagnetic waves, alternating current circuits, and molecules.

Explanation:

Answer:

Moves to and from about it's mean position in a fixed time interval.

An automobile accelerates from rest 5.0m/s ever second. How far does it travel after 3.0 s

Answers

Answer:

30 m

Explanation:

the answer to this question is 30

Cheetah mothers perform a number of different behaviors. They and their cubs stay in one place for only four days, moving on before they leave too strong a smell behind in one area. They also expend time and energy teaching their cubs to hunt successfully. In one or two sentences, explain how these behaviors affect cheetah reproductive success.(2 points)

Answers

Answer:

Cheetah cubs are in danger from predators like lions and hyenas which can track their prey by scent and so the mother and her cubs leave an area when their scent is too strong so that they are not hunted and the cubs survive.

Mother Cheetahs also train their cubs to hunt so that they may get food for themselves which will ensure their survival as well thus showing that both of these practices can impact on reproductive success.

What are some What are some of the possible advantages of memory being a constructive process?

Answers

Answer:

An apparent memory of an event that did not actually happen, unconsciously constructed to fill a gap.

Explanation:

We eat pizza from the inside out???

Answers

Answer:

what

Explanation:

what I dont get it??

Answer:

that makes me confused I don't think of pizza the same again LOL

1. An astronaut in a spacesuit has a mass of 80 kilograms. What is the weight of this astronaut on the surface of the Moon where the strength of gravity is approximately 1/6 that of Earth? (2 Points)

Answers

Weight = 80 x (9.8/6) = .... N

Without a battery , why would a circuit not work

Answers

Answer:

The cell will have no electromotive force in it.

Explanation:

The battery provides the chemical energy that produces the force needed to move electron around the circuit and to generate electrical energy.

electrochemical cells are devices in which chemical reactions produce electric current. The electromotive force inherent in a cell provides the driving force for the current to flow. Without this force, there would not be enough energy to move the electrons.  

Francesco, a pizza chef preparing the dough for your pizza is throwing it to expand it. In this process, you notice that a chunk of it comes off, flying separately from the rest and on to the floor. If Francesco is 6 feet and 3 inches tall, and the chunk flies off vertically straight up from this height at a speed of 1 m/s, with what speed does the chunk hit the ground?

Answers

Answer:

6.12 m/s

Explanation:

In order to solve this we have two parts of this problem, first we have the time that the pizza dough spent going upwards and after that we have a free fall from there, so we will use the free fall formula after we figured out whats the final height the dough reached after being thrown from Francesco's height which is 6ft3inches or 1.90 meters

We first have to find out how much time the dough spent in the air before reaching 0 as final speed and then started the free falling:

The formula would be:

[tex]Vf=Vo-at\\0=1-(-9.81t)\\1=9.81t\\t=\frac{1}{9.81}\\t=.101[/tex]

The formula to find out final height would be:

[tex]y = \frac{ h + Vy (t-gt^{2})}{2} \\[/tex]

Now we just insert the values we know

[tex]y = h+ \frac{ Vy (t-gt^{2})}{2} \\\\y = 1.90 +\frac{ .101-(-9.81)(.101)^{2})}{2} \\\\y=1.91[/tex]

So from 1.91 meteres the free fal started we have to just calculate the final velocity with the formula for free fall and velocity:

[tex](vf)^{2} =Vo^2 +2ad[/tex]

Since Vo is 0 because we are talking about free falling we just insert the values we know:

[tex](vf)^{2} =Vo^2 +2ad\\(vf)^{2} =2ad\\(vf)^{2} =2(9.81)(1.91)\\vf=\sqrt{37.4742} \\Vf=6.12m/s[/tex]

So the final speed that the dough hit the ground with is 6.12 m/s

During an experiment, your teacher dropped a tennis ball out the window. The ball hits the ground 3.0 second
later. What was the ball's final velocity just before it hit the ground?

Answers

Answer:

29.4m/s

Explanation:

Given.

Time (t) = 3.0s

Required

Determine the final velocity

Since, it's a vertical motion, we make use of the following formula to solve for the final velocity (v).

v = u + gt

Where u = 0, g = 9.8m/s² and t = 3s

v = 0 + 9.8m/s² *3s

v = 0 + 29.4m/s

v = 29.4m/s

Hence, the final velocity is 29.4m/s

I got this information for a lab but I don't know how to do the hypothesis and the conclusion please can you guys help me with it quickly ​

Answers

Answer:

A hypothesis is what you think will happen.

A conclusion is the results of an experiment summarized.

Hope this helps.

when an objects motion is not changing , the object is moving at a ___

Answers

I’m gonna say it’s No Speed. Hope this helps!

Two parallel plates, each of area 3.37 cm2, are separated by 5.40 mm. The space between the plates is filled with air. A voltage of 8.55 V is applied between the plates. Calculate the magnitude of the electric field between the plates. Tries 0/20 Calculate the amount of the electric charge stored on each plate. Tries 0/20 Now distilled water is placed between the plates and the capacitor is charged up again to the same voltage as before. Calculate the magnitude of charge stored on each plate in this case. (Use κ = 83.0 for the dielectric constant of water.)

Answers

Answer:

1, 1583.33 V/m

2, 4.72*10^-12 C

3, 39.2*10^-11 C

Explanation:

1

E = V / d

E = 8.55 / 5.4*10^-3

E = 8.55 / 0.0054

E = 1583.33 V/m

2

Capacitance, C = (k * e0 * A) / d, where k = 1

A = area of capacitor, 3.37 cm² = 3.37*10^-4 m²

d = plate separation, 5.4 mm

e0 = Constant, 8.85*10^-12

Applying these, we have

C = (1 * 8.85*10^-12 * 3.37*10^-4) / 5.4*10^-3

C = 29.82*10^-16 / 0.0054

C = 5.52*10^-13 F

Since Q = CV, then

Q = 5.52*10^-13 * 8.55

Q = 4.72*10^-12 C

3

We are given that k = 83, so

Capacitance, C = (k * e0 * A) / d

C = (83 * 8.85*10^-12 * 3.37*10^-4) / 5.4*10^-3

C = 2.475*10^-13 / 0.0054

C = 4.58*10^-11 F

Q = CV

Q = 4.58*10^-11 * 8.55

Q = 39.2*10^-11 C

show that the motion of Bob of simple pendelum is simple harmonic. find it's time period. ​

Answers

Answer:

a) = 11.29°

b) = 1.93 m/s²

Explanation:

θ = θ(m) sin(w(n).t + Φ)

w(n) = 2π / t

w(n) = 6.284 / 1.3

w(n) = 4.834 rad/s

θ• = θ(m).w(n).cos (w(n).t + Φ)

θ•(m) = θ(m).w(n)

v(m) = L.θ•(m)

v(m) = L.θ(m).w(n)

θ(m) = v(m) / L.w(n)

For a simple pendulum,

w(n) = √(g / l)

l = g / w(n)²

l = 9.8 / 4.834²

l = 9.8 / 23.368

l = 0.42 m

Remember, θ(m) = v(m) / l.w(n)

θ(m) = 0.4 / (0.42 * 4.834)

θ(m) = 0.4 / 2.03

θ(m) = 0.197 rad

Converting to °, we have

0.197 * 360 * 1/2π

0.197 rad = 11.29°

Thus, the amplitude of the motion is 11.29°

a(t) = l.θ(t)

Tangential acceleration occurs when θ(t) is maximum, so

θ(t) = -θ(m).w(n)².sin(w(n)t + Φ)

θ(t max) = θ(m).w(n)²

a(t max) = l.θ(m).w(n)²

a(t max) = 0.42 * 0.197 * 4.834²

a(t max) = 1.93 m/s²

Explanation:

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