The moment of inertia of a thin ring of mass M and radius R about its symmetry axis is I C M = M R 2 . Kira is working the ring‑toss booth at a local carnival. While waiting for customers, Kira occupies her time by twirling one of the plastic rings of mass M and radius R about her finger. Model the motion of the plastic ring as a thin ring rotating about a point on its circumference. What is the moment of inertia of the plastic ring?

So total moment of inertia of the ring about its end is given as

Explanation:

As we know that the moment of inertia of the ring about its axis passing through COM is given by the formula

now we know that

if we wish to find the moment of inertia passing through an axis from its circumference which is parallel to the axis passing from COM is given by parallel axis theorem

So we will have

so here we have

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.