How Do Kangaroos Hop?
How Do Kangaroos Hop? The large, stretchy tendons in a kangaroo’s hind legs act like giant springs. As these tendons strain and contract, they generate most of the...
Read MoreHow Do Kangaroos Hop? The large, stretchy tendons in a kangaroo’s hind legs act like giant springs. As these tendons strain and contract, they generate most of the...
Read MoreWho Invented Springs? Simple non-coiled springs were used throughout human history. In the Bronze Age more sophisticated spring devices were used, as shown by the...
Read MoreHow Does a Cylinder Lock and Key Work? A cylinder lock is made up of a revolving metal cylinder. Five small pins fall down into the cylinder when it is locked. There...
Read MoreWhy Does a Ball Bounce? No matter if a ball is solid or inflated, it bounces because it is elastic. Take a rubber ball and squeeze it in your hand. When you let it go,...
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