At t = 0, a wheel rotating about a fixed axis at a constant angular acceleration has an angular velocity of 2.0 rad/s. two seconds later it has turned through 5.0 complete revolutions. what is the angular acceleration of this wheel?

As per condition of constant angular acceleration we can use kinematics

so here we will have

here we know that

t = 2 s

so above is angular acceleration of the wheel

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic