Physic <span title="C.............rotation!!!!!!!!!!!!!!1?">C.............rotation!!!...</span>

Question

A wheel of radius 0.20 m is mounted on a frictionless horizontal axis. A massless cord is wrapped around the wheel and attached to a 2.0 kg object that slides on a frictionless surface inclined at an angle of 20 degree with the horizontal. The object accelerates down the incline at 2.0 m/s^2. What is the rotational inertia of the wheel about its axis of rotation?

Answer 1

My answer would be 1.

you say it is frictionless. so the object will be moving with no end at a constant speed. I am sure that objects will continue moving at a constant speed in the absence of outside force.

Answer 2

I=mr^2/2