Question

10. A bike wheel is spinning at a constant angular velocity of 4 rad/s.strodsa. What is the net torque acting upon this bike wheel?ustb. What is the average angular acceleration of the bike wheelC. Explain your answers to (a) and (b).

Answer 1

10.

a) The torque can be written as follow:

$\tau=I\alpha$

where,

I: moment of inertia

α: angular acceleration

τ: torque

Consider that if the angular velocity of the bike wheel is constant, then, the angular acceleration is zero. Then, α and the torque equals zero.

τ = 0 Nm

b) The angular acceleration is given by:

$\alpha=\frac{\Delta\omega}{\Delta t}$

where w is the angular speed. As in the previous point, consider that the angular velocity is constant, then, there is no change in the angular velocity and the angular acceleration is zero.

α = 0 rad/s^2

c) The explanations are given above.