Ayo-yo is swung around the head of a person in a horizontal circle. what provides the
centripetal force on the yo-yo?

There is a net force towards the center of the circle that causes the yo-yo to seek the center.

Circular Motion Qualities:

-Constant speed

-Accelerating

-Velocity is changing constantly.

Centripetal acceleration perpendicular to the motion causes the object to change direction

a_c=v^2/r

Tangential acceleration in the direction of the motion causes and increase or decrease in speed.

choosing tennis and golf balls is your inde choice.

their mass and volume are dep

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.