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
kirill115 [55]
3 years ago
5

A cylinder with moment of inertia I about its center of mass, mass m, and radius r has a string wrapped around it which is tied

to the ceiling (Figure 1) . The cylinder's vertical position as a function of time is y(t). At time t=0 the cylinder is released from rest at a height h above the ground.
A) The string constrains the rotational and translational motion of the cylinder. What is the relationship between the angular rotation rate ?and v, the velocity of the center of mass of the cylinder?
B) Remember that upward motion corresponds to positive linear velocity, and counterclockwise rotation corresponds to positive angular velocity.
C) Suppose that at a certain instant the velocity of the cylinder is v. What is its total kinetic energy, Ktotal, at that instant?
D) Suppose that at a certain instant the velocity of the cylinder is v. What is its total kinetic energy, Ktotal, at that instant?
Physics
1 answer:
NARA [144]3 years ago
5 0

Answer:

Explanation:

Let us study the downward  movement of cylinder which accelerates as well as rotates .

A)

If v be the linear downward velocity of cm of cylinder and ω be angular velocity of cylinder

v = ωr , when there is no slippage of string around cylinder.

B &C )

Total kinetic energy = Rotational + linear

= 1/2 Iω² + 1/2 m v²

1/2 x1/2 mr²ω² +1/2 m v²

= 1/4  mv² +1/2 m v²

= 3/4 m v²

For downward acceleration ,

mg - T = ma where T is tension in string.

Rotational movement

Torque = T x r

Tr = I α , I is moment of inertia and α is angular acceleration .

= I a/r

T = I a / r² , Putting this value of T in earlier equation

mg - I a / r²  = ma

a (I  / r² +m )= mg

a = mg /  (I  / r² +m )

For cylinders

I = .5 mr²

a = g / (.5 +1)

= g / 1.5

You might be interested in
Tp-18 what should you do when operating a boat in large waves and high wind?
deff fn [24]

1) Try to head into the waves at some slight angle and the speed of the boat should be reduced. 

2) In order to ride up and over the waves, the speed of the boat should be slow. 

3) The less the speed of the boat, and the less strain will be put on the hull and superstructure.

5 0
3 years ago
Tom Cruise jumped from one building to other building while filming the roof chase scene in Mission: Impossible - Fallout. He di
OLga [1]

Answer:

v_0=9.9\ m.s^{-1}

Explanation:

Given:

  • angle of launch of projectile from horizontal, \theta=15^{\circ}
  • range of projectile, R=5\ m

<u>We have formula  for the range of projectile:</u>

R=\frac{v_0^2\times sin\ 2\theta}{g}

putting the respective values

5=\frac{v_0^2\times sin\ 30^{\circ}}{9.8}

v_0=9.9\ m.s^{-1} is the velocity with which Tom should jump to land on the other roof.

3 0
3 years ago
A belief, judgment, or way of thinking about something is called a(n) __________.
NISA [10]
That is an opinion. Opinion is not fact, although it can be based upon fact.
8 0
3 years ago
Read 2 more answers
A 1,000 kg ball traveling at 5 m/s would have
jonny [76]

Answer:

15 because 5×5×5 is the same thing as 5×3 which equals to 15

6 0
3 years ago
Read 2 more answers
Does coefficient of thermal expansion vary with temperature?
N76 [4]

Answer:

yes

Explanation:

8 0
3 years ago
Other questions:
  • Distance (m)
    8·1 answer
  • a man is pulling a block with a mass of 6.2kg across a horizontal surface and accelerates the block at a rate of 0.50m/s.the coe
    10·2 answers
  • What happens to Earth’s temperature as cloud cover increases?
    9·2 answers
  • Which statement best describes the explanatory powers of hypotheses and theories?
    6·2 answers
  • 009 10.0 points
    9·1 answer
  • How are carbon tetrachloride and sodium chloride different from each other?
    6·2 answers
  • When the plutonium bomb was tested in New Mexico in 1945, approximately 1 gram of matter was converted into energy. Suppose anot
    14·1 answer
  • In recent years, astronomers have found planets orbiting nearby stars that are quite different from planets in our solar system.
    10·1 answer
  • Which of the following refers to the region where there is a high probability of finding an electron?
    12·2 answers
  • How much force is required to stretch a spring 12 cm, if the spring constant is 55 N/m?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!