If you drop a rock from a height of 10 m, it accelerates at 9.8 m/s² and strikes the ground
1.42857 s later.
If you drop the same rock from half that
height, what will be its acceleration?

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever

it doesn't. it was imagined up in the middle ages.