It's real name is "WEIGHT TRANSFER MACHINE". But, more commonly known as a "SLED".
It depends on what kind your talking about because they can al sorts of things.
a window is a froggy
candy bars, crackers, chips, juice
pushes and pulls are things you do when energy is applied
This is called a Bailer
What kind of machine is slide
The Earth's gravity.
well it is a lever bacause a lever is used to adjust things
well it is a lever bacause a lever is used to adjust things
a simple machine that pushes and pulls is like a close line you push it and pull it back
The earth has gravity that pulls things to itself. The earth pulls human beings, the air we breathe, water, animals, trees, etc., to itself by its gravity.