Pandemic shortages weren’t limited to hand sanitizer and toilet paper: For the first time in anyone’s memory, the humble tennis ball was a hot commodity — and a grail-like find. Southeast ...

Here's how to get more bounce from a normal tennis ball - buddy it up with a heavier ball for twice the impact. Drop them and stand back! Download the Two Ball Bounce PDF(373 Kb). Adobe Acrobat is ...

The normal force of the surface on the ball is always upward, slowing the ball's downward velocity and propelling it skyward. The friction force is usually backward, reducing the horizontal ...

The International Tennis Federation (ITF) has developed a prototype of a ball without a fabric cover which it hopes will provide an environmentally friendly option to the rubber and felt in ...