Spear-thrower

device · 30000 BC · Stone Age

A lever that extends the arm when throwing a spear.

What it is made of

• Spear-thrower shaft — has part. A lever that extends the arm.
• Hook spur — has part. A hook against which the dart rests.

Principles and materials it uses

• Lever — uses. It extends the arm — a lever.
• Spear — uses. It throws darts.
• Wood — is made of. A spear-thrower is a wooden or bone stick with a hook.

Take Spear-thrower apart

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