Physics, 28.11.2019 01:31 Legoman29305

An object has rotational inertia i. the object, initially at rest, begins to rotate with a constant angular acceleration of magnitude α. what is the magnitude of the angular momentum l of the object after time t? express your answer in terms of i, α, and t.

Answers: 1

Show answers

Answers

Answer from: iliketurtures

Explanation:

initial angular velocity, ωo = 0

angular acceleration = α

time = t

let the angular velocity after time t is ω.

Use first equation of motion for rotational motion

ω = o + α t

ω = αt

The angular momentum is given by

Angular momentum = moment of inertia x angular velocity

L = I x ω

L = I x αt

L = I α t

Answer from: wubzwaters

The angular momentum of the object in terms of angular velocity, time of motion and angular acceleration is L = Iαt.

The given parameters;

Rotational inertia of the object, = I Initial angular velocity of the object, ω₀ = 0Angular acceleration of the object, = αAngular momentum of the object, = L Time of motion of the object, = t

The final angular velocity of the object is determined using first kinematic equation;

$\omega_f = \omega_i + \alpha t\\\\\omega_f = 0 + \alpha t\\\\\omega_f = \alpha t$

The angular momentum of the object is calculated as;

$L= I\omega_f$

$L = I\alpha t$

Thus, the angular momentum of the object in terms of angular velocity, time of motion and angular acceleration is L = Iαt.

Learn more here:link

Answer from: Quest

Answer:

the word that best describes martin luther king jr.'s tone in the video is dignified

explanation:

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

Answer from: Quest

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

Other questions on the subject: Physics

Physics, 22.06.2019 08:00, kaylaamberd

Aheat engine running backward is called a refrigerator if its purpose is to extract heat from a cold reservoir. the same engine running backward is called a heat pump if its purpose is to exhaust warm air into the hot reservoir. heat pumps are widely used for home heating. you can think of a heat pump as a refrigerator that is cooling the already cold outdoors and, with its exhaust heat qh, warming the indoors. perhaps this seems a little silly, but consider the following. electricity can be directly used to heat a home by passing an electric current through a heating coil. this is a direct, 100% conversion of work to heat. that is, 19.0 \rm kw of electric power (generated by doing work at the rate 19.0 kj/s at the power plant) produces heat energy inside the home at a rate of 19.0 kj/s. suppose that the neighbor's home has a heat pump with a coefficient of performance of 4.00, a realistic value. note: with a refrigerator, "what you get" is heat removed. but with a heat pump, "what you get" is heat delivered. so the coefficient of performance of a heat pump is k=qh/win. an average price for electricity is about 40 mj per dollar. a furnace or heat pump will run typically 200 hours per month during the winter. what does one month's heating cost in the home with a 16.0 kw electric heater? what does one month's heating cost in the home of a neighbor who uses a heat pump to provide the same amount of heating?

Answers: 2

continue

Physics, 22.06.2019 10:50, dontcareanyonemo

The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)

Answers: 3

continue

Physics, 22.06.2019 11:30, 21ghostrider21

Which of these questions might a character ask if the conflict is man versus self? a. which path should i take to better myself? b. which boulder will be too heavy for me to carry? c. which friend is going to ditch me today? d. all of the above

Answers: 1

continue

Physics, 22.06.2019 14:10, chuchi24

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).

Answers: 3

continue

You know the right answer?

An object has rotational inertia i. the object, initially at rest, begins to rotate with a constant...