Book 28, Question 108 · Video
How have tennis rackets changed?
Old rackets were made of wood, with small heads and heavy frames. In the 1970s and 80s, metal and then graphite and other materials made rackets lighter, stiffer, and bigger. A bigger head means a larger sweet spot, and a lighter frame can swing faster. Today, players can hit with more power and spin than before. Rules limit racket sizes to keep the game fair.
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What Crafty Clover says in this video
Intro
Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. How have tennis rackets changed?
The Big Idea
Tennis rackets used to be made of wood! Now they're very different. How have they changed?
Old Rackets
Step one: Old Rackets. Old rackets were made of wood, with small heads and heavy frames. They were hard to swing fast.
New Materials
Step two: New Materials. In the 1970s and 80s, metal and then graphite and other materials made rackets lighter, stiffer, and bigger. A bigger head means a larger sweet spot, and a lighter frame can swing faster.
Today
Step three: Today. Today, players can hit with more power and spin than before. Rules limit racket sizes to keep the game fair.
A Closer Look
Let's take a closer look! Old and heavy. Lighter. Lightest. Bigger now.
Quick Facts
Quick facts! Wooden rackets are still used in some old-style tournaments. Lighter means faster swings. Bigger sweet spot. Rules limit sizes.
Think Like a Scientist
Now, think like a scientist! Look at pictures of old and new rackets. Compare them side by side. Look at size and shape. Write three differences. Which would you rather use?
Outro
Tennis rackets were once small, heavy, and wooden. Metal and graphite made them lighter, stiffer, and bigger, with larger sweet spots and faster swings. Players now hit with more power and spin, and rules limit sizes. Next time you see a match, look closely at the rackets the players use. Science is amazing! Remember, every big discovery starts with a small question. Keep looking, keep learning, and keep asking why! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!