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27
B
rainstorming
B
rainstorming
This is a pitching machine for helping
baseball players practicing hitting baseballs.
The way the machine projects the ball is just
like how a pitcher throws the ball. Batters can
practice hitting the ball this way. So how could a pitching
machine “throw” the ball? First, baseballs are inserted into
a spiraling tube. Underneath the tube is a battery-powered
vibrating motor. Once a ball reaches the bottom of the spiral tube, the
motor’s vibration causes the ball to jump onto a declined track. The ball
slides down the track from its own gravity, before arriving onto a small
platform that projects the ball out towards the batter for he or she to hit.
What other mechanisms in life apply the spiral bevel?
Daily
Application
Daily
Application
This is a water balloon- hitting game we sometimes see at a carnival. The
game is set up by placing a big tube on two wooden boards at different heights.
This makes an inclined surface for water balloons to slide down. At the end of
the tube is a flat platform. The design is as simple as a pitch- ball machine.
Before the game starts, the owner needs to prepare a lot of water balloons.
When players arrive, the owner gives them a hammer and asks the them to
wait at the end of the tube.
And then the game begins! The owner will put in several water balloons
from the top entry of the tube. The water
balloons will slide down the tube under
their own weight. When the water balloons
appear at the end of the tube, the player
tries to hit as many of the water balloons
as he or she can. Most importantly, it only
counts if the water balloons are destroyed.
Kids, do you understand the principles of the
pitching machine? Follow the steps and build
a pitching machine!
7
Pitching
Machine
Scientific
Application
Slopes and Gravity