Author Question: Which is the correct expression for rotational kinetic energy? a. Half of the rotational inertia ... (Read 134 times)

stevenposner · **on:** Jul 28, 2018

Which is the correct expression for rotational kinetic energy?
a. Half of the rotational inertia times the square of the rotational speed.
b. The mass times the speed times the radius.
c. The mass times velocity.
d. Half of the mass times the square of the speed.
e. The force times the distance.

Question 2

Stable equilibrium is:
a. an equilibrium state where any small rotation results in a torque that acts to produce rotation back in the opposite direction.
b. any form of equilibrium, because all equilibrium conditions are stable.
c. an equilibrium state where nothing is moving.
d. an equilibrium state where there is no net torque or net force.
e. an equilibrium state where no torque is involved.