PHYSICS IS EVERYWHERE!
Physics is the set of game rules the universe plays by. Even a simple toy like the Ball Blaster Pro shows these rules in action. When you stretch the elastics, release the trigger, send the ball flying through the air, hit a target, you’re using the same physics used to build machines, sports gear, spacecraft and even toys.
WHAT CAN YOU LEARN AS YOU PLAY?
Potential Energy (Ep = 1/2 * k * x^2)
Energy that is stored and waiting to be released (like a battery). In this launcher, the stretched elastics store that energy. When you pull the trigger, the stored energy is released and transferred into the ping-pong ball. Using one or two elastics per side changes how much energy is stored. More elastics create more tension, increasing the potential energy available for the launch. This stored energy determines how fast the ball starts moving and how far it can travel.
Kinetic Energy (Ek = 1/2 * m * v^2)
The energy an object has when it’s moving. When the trigger releases, the potential energy in the elastics becomes kinetic energy in the ball. Because ping-pong balls have very low mass, even a small amount of kinetic energy makes them move quickly, but they also slow down faster than heavier objects. The amount of kinetic energy the ball receives affects its speed, distance, and time in the air before gravity and air resistance bring it down.
Trajectory (y = x * tan(theta) - (g * x^2) / (2 * v^2 * cos(theta)^2))
The curved path an object follows after it’s launched. All objects follow a curved path, but light objects like ping-pong balls lose speed quickly and drop sooner because they have low mass and low kinetic energy. By tilting the launcher up or down, you can control the arc of the ball. Try different angles and one or two elastics per side to see how changes in energy affect how high, far, or straight the ball travels.
Energy Transfer (Eimpact = 1/2 * m * v^2)
What happens when moving energy is passed from one object to another. After launch, the ping-pong ball carries kinetic energy through the air. When it hits a target, that energy transfers into the target, causing it to move, tip, or slide. Because ping-pong balls have low mass, they don’t carry much energy, so the impact is gentle and most of the energy is absorbed by the target as the ball slows down.
Why Only Two Elastics? (Extra Energy -> Frame Stress -> Possible Breakage)
Ping-pong balls are very light and don’t have enough mass to absorb large amounts of energy. If you add more than two elastics per side, the extra energy doesn’t transfer into the ball — it goes into the frame, stressing parts and possibly causing breakage. Using one or two elastics per side keeps the blaster safe, accurate, and working properly.