Pulling a wheel with a string?
a bicycle wheel is mounted on a fixed, frictionless axle, with...
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?
Answers: 1
Physics, 21.06.2019 21:00
Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15
Answers: 2
Physics, 22.06.2019 03:00
Oxygen and nutrients are moved through the body by the: a. circulatory system c. lymphatic system b. digestive system d. reproductive system
Answers: 1
History, 16.01.2022 05:40
Mathematics, 16.01.2022 05:40
Mathematics, 16.01.2022 05:40
Chemistry, 16.01.2022 05:40
Social Studies, 16.01.2022 05:40
Physics, 16.01.2022 05:40
Business, 16.01.2022 05:50
Biology, 16.01.2022 05:50
Spanish, 16.01.2022 05:50
World Languages, 16.01.2022 05:50
Mathematics, 16.01.2022 05:50