becuz it not electronic and it is easy to use .
homecoming
It's a screw on thanks!
A train is not a simple machine.
A complex machine.
A fulcrum is a part of a simple machine, the lever. Without the fulcrum what is left of the simple machine can no longer increase the applied force and is no longer a simple machine.
A wrench is a wheel because when put over a bolt it spins like a wheel. The bolt would be the axle. A wrench is a wheel and axle simple machine.
homecoming
Not a machine but a tool, a wrench.
inclined plane
It's a screw on thanks!
A spanner is a type of lever, more specifically a wrench, used for tightening and loosening nuts and bolts.
A wrench is a lever for tightening or loosening bolts .
An airplane is not a simple machine. A lever is a simple machine. A wheel is a simple machine. Any machine that can be described by a mathematical formula is a simple machine.
It is a simple lever mechanism using to hold round objects firmly without slipping, as well as to tighten square, hexagonal nuts or bolts.
A pulley isn't a kind of simple machine, it is a simple machine
simple machine
Its a simple machine which can crush any complex machine