Question

A steel bicycle wheel without the rubber tire is rotating freely with angular speed of 18.00 rad/s. The temperature of the wheel changes from -100.0 to 300.0 º C. No net external torque acts on the wheel and the mass of the spokes is negligible. Does the speed increase or decrease as the wheel heats up? Why? What is the final angular speed

Answer #1

A steel bicycle wheel (without the rubber tire) is rotating
freely with an angular speed of 11.2 rad/s. The temperature of the
wheel changes from -122 to 243 °C. No net external torque acts on
the wheel, and the mass of the spokes is negligible. What is the
angular speed of the wheel at the higher temperature?

A steel bicycle wheel (without the rubber tire) is rotating
freely with an angular speed of 11.4 rad/s. The temperature of the
wheel changes from -181 to 283 °C. No net external torque acts on
the wheel, and the mass of the spokes is negligible. What is the
angular speed of the wheel at the higher temperature?

Now your bicycle wheel is rotating with an angular speed of 46.4
rad/s. The wheel has a mass of 3.2 kg and a radius of 45.8 cm.
Treat the wheel as a solid thin disc.
(a)Calculate the rotational kinetic energy of the wheel in
J.
(b)Calculate the angular speed the wheel must have if its
rotational kinetic energy is doubled, in rad/s.

a bicycle wheel with radius R,mass M,and moment of inertia
I=3/4MR^2 is mounted inthe shop so that it can freely turn around a
fixed horizontal axis. Someone walking by accidently drops a
glob(mass m) of rubber sement on the tire at a point that is a
horizontal distance 1/2 R from the wheel's center. the gob has a
vertical speed |v| just before it hits. What is the magnitude |w|
of the wheel's angular velocity just after the glob hits...

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