Pulling a wheel with a string?
a bicycle wheel is mounted on a fixed, frictionless axle, with...
![subject](/tpl/images/cats/fizika.png)
Pulling a wheel with a string?
a bicycle wheel is mounted on a fixed, frictionless axle, with a light string wound around its rim. the wheel has moment of inertia i = k m r^2, where m is its mass, r is its radius, and k is a dimensionless constant between zero and one. the wheel is rotating counterclockwise with angular velocity omega_0, when at time t=0 someone starts pulling the string with a force of magnitude f. assume that the string does not slip on the wheel.
a. suppose that after a certain time t, the string has been pulled through a distance l. what is the final rotational speed omega_final of the wheel? express answer in terms of l, f, i, and omega_0. i found that the final kinetic energy of the wheel is k_f = .5i omega_0^2 + fl, but i can't find an equation that relates this to final rotational speed.
b. what is the instantaneous power p delivered to the wheel via the force f at time t = 0?
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Other questions on the subject: Physics
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 05:00, jocelynfray16
Which of the following is the result of the nuclear weak force? the instability of large nuclei the repelling force between positively charged protons the structure of the atom certain types of nuclear decay
Answers: 2
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 09:40, wi8wuwj283jendjdudjd
When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great. d) about 10 times as great.
Answers: 1
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 17:00, deathray4035
Photons with the highest energy have the longest period
Answers: 1
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 18:30, aROSSconpollo
Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.
Answers: 1
You know the right answer?
Questions in other subjects:
![Konu](/tpl/images/cats/informatica.png)
Computers and Technology, 28.03.2020 00:52
![Konu](/tpl/images/cats/mat.png)
Mathematics, 28.03.2020 00:52
![Konu](/tpl/images/cats/biologiya.png)
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 28.03.2020 00:52
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 28.03.2020 00:52
![Konu](/tpl/images/cats/mat.png)
Mathematics, 28.03.2020 00:52
![Konu](/tpl/images/cats/istoriya.png)