You can make a ramp. In scientific terms, it would be an inclined plain. You can roll balls and drive wheelchairs up and down ramps.
no
a machine that is simple to use
That isn't possible, not with a simple machine and not with a complicated machine, since otherwise, conservation of energy would be violated.
I don’t know
a knife
I don’t know
a pulley
We use simple machines
a lot of people use the simple machine .
That would be a pulley.
a common machine is two simple machine use to overcome on simple task
a machine is use in building