Traditional games, top lesson plans, middle class

(1) The cone tip of the gyro is embedded with small steel balls to reduce friction by rolling instead of sliding;

(2) When the whip is pulled out quickly, the gyro will rotate quickly and change from a static state to a moving state due to the force; Therefore, it shows that force can change the motion state of objects;

(3) Because the gyro has inertia, it can continue to rotate.

So the answer is: reduce; Change the motion state of an object; inertia