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
Inessa [10]
3 years ago
14

A disk of radius 14 cm, initially at rest, begins rotating about its axis with a constant angular acceleration of 8.2 rad/s2. Wh

at are the following values at t = 10.0 s?(a) the angular velocity of the diskrad/s(b) the tangential acceleration at and the centripetal acceleration ac of a point at the edge of the diskat = m/s2ac = m/s2
Physics
1 answer:
ss7ja [257]3 years ago
6 0

Answer:

a) the angular velocity is ω= 82 rad/seg

b) the tangencial acceleration is a = 1.148 m/s²

c) the centripetal acceleration is ac = 941.36 m/s²

Explanation:

for rotational motion

ω= angular velocity

ωo = initial angular velocity

α= angular acceleration

t = time

R= radius

a= tangencial acceleration

ac = centripetal acceleration

a) ω= ωo + α*t = 0 + 8.2 rad/s2 * 10 s = 82 rad/seg

b) a= α*R =  8.2 rad/s2* 14 cm = 114.8 cm/s² = 1.148 m/s²

c) ac= ω²*R =  (82 rad/seg)² * 14 cm = 94136 cm/s² = 941.36 m/s²

You might be interested in
The coefficient of static friction between a book and the level surface it slides on is 0.65. If the mass of the book is 0.2 kg,
just olya [345]

Answer: 1.274 N minimum force required to slide the book across the surface

Explanation:

Mass of the book = m = 0.2 kg

Normal force acting on the book,N = mg

Coefficient of friction =mu_s = 0.65

Minimum force required to slide the book across the surface= F

F=\mu_s\times N

F=0.65\times 0.2 kg\times 9.8 m/s^2=1.274 N

1.274 N minimum force required to slide the book across the surface

7 0
3 years ago
Read 2 more answers
Osmium (os) is the densest element known (density = 22.57 g/cm3). Calculate the mass in pounds and in kilograms of an os sphere
Rufina [12.5K]

<u>Answer:</u>

    Mass in kg = 39.88

    Mass in pounds = 87.92

<u>Explanation:</u>

   We have the expression for Density, ρ = Mass / Volume, in this case density is given and we need to find mass and volume.

   Volume of a sphere, we have the expression V = \frac{4}{3} \pi r^3, where r is the radius of sphere.

   Radius of sphere, r = Half of diameter = 15/2 = 7.5 cm

   So V = \frac{4}{3}* \pi* 7.5^3 = 1767.15 cm^3

  Mass = Volume *  Density = 1767.15*22.57 = 39884.49 g

    Mass in kg = 39884.49/1000 = 39.88 kg

    Mass in pounds = 39.88*2.205 = 87.92 lb

4 0
3 years ago
01
klasskru [66]

The statement which describes how a machine can help make work easier is that It can put out more force than the input force by decreasing the distance over which force is applied, therefore the correct option is option A.

<h3>What is work done?</h3>

The total amount of energy transferred when a force is applied to move an object through some distance

The work done is the multiplication of applied force with displacement.

Work Done = Force * Displacement

As work done depends both on the force as well as the displacement force and be reduced by reducing the displacement if the same amount of work is performed by the machine.

The correct answer is option A since the statement that describes how a machine might assist in making work easier says that it can put out greater force than the input force by reducing the distance over which force is exerted.

Learn more about work done from here

brainly.com/question/13662169

#SPJ1

5 0
2 years ago
It's important to match your exercise shoes with the type of exercise in which you will be participating, Please select the best
Feliz [49]

Answer:

true

Explanation:

8 0
4 years ago
Read 2 more answers
What is electrical energy​
Inga [223]

Answer:

Electric is produce by water it is very helpful in our life

7 0
3 years ago
Read 2 more answers
Other questions:
  • Two point charges, +2.80 μC and -6.20 μC, are separated by 2.30 m. What is the electric potential midway between them?
    11·1 answer
  • If an object's mass is decreasing while a constant force is applied to the object, would its acceleration decrease, increase, or
    15·1 answer
  • A slab of insulating material has thickness 2d and is oriented so that its faces are parallel to the yz-plane and given by the p
    13·1 answer
  • at 20 c a length of copper wire has a resistance of 5.0. What is its resistance when the wire is heated to 80c? let a=.0004 at 2
    11·1 answer
  • Light can travel through outer space from the Sun to the Earth. This shows that
    13·1 answer
  • Which statement best describes the work and energy in these examples?
    10·2 answers
  • Which electromagnetic waves can have wavelengths of 300 nm?
    10·1 answer
  • Explain the expression “light travels at a speed”.
    12·1 answer
  • Particulate Motion Unit Test
    10·2 answers
  • . An experimental rocket plane lands on skids on a dry lake bed. If it’s traveling at 80.0 m/s when it touches down, how far doe
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!