Question

key, screw and ramp are working on principle of

Answer 1

Rotation motion......

Answer 2

heya

key, screw and ramp are working on the principle of 'ROTATION MOTION' because when u have to open a lock so we put the key in the locker and rotate it to open or close it.
when we want to screw a nail so we put the screwler and rotate it.

thats why, key, screw and ramp are working on the principle of 'ROTATION MOTION'.

thank u