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13:
Wind resistance creates higher air
pressure above the ball which
pushes against the ball, making it
fly in a curved flight path.
Curve balls start when a pitcher
throws them with topspin.
People used to think curve balls were just an
illusion. But thanks to technology and the
science of physics, we now know that a
baseball actually does curve, as much as 18
inches, when thrown by a skilled pitcher.
*Science, Technology, Engineering, Math
As the ball
spins, its bottom
surface moves in
the same direction
in which the air moves.
Topspin makes the top of the
baseball spin in the opposite
direction to the air moving
over the ball's surface, creat-
ing wind resistance.
air pressure
air flow
topspin
wind resistance
Pitchers can throw several kinds of pitches to confuse
the batter. Do the math to discover which is which.
Follow the
curved
paths to
reach the
baseball.
This pitch makes the
ball curve away from
the batter.
This ball drops
suddenly just before
it reaches home plate.
This ball
curves down
and away
from the
batter.
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