A doorknob is a very unique form of lever consisting of a wheel [and naturally a wheel has an axle]. In actuality a wheel IS a battery of an infinite number of levers!
Gears and levers
You are using a wheel and axle simple machine when you twist a doorknob. The wheel (the doorknob) rotates on the axle (the spindle), allowing you to easily open or close the door.
A doorknob is a very unique form of lever consisting of a wheel [and naturally a wheel has an axle]. In actuality a wheel IS a battery of an infinite number of levers!
A doorknob is a type of wheel and axle simple machine. It allows a person to apply force at the outer edge (wheel) to turn the central shaft (axle) which operates the latch mechanism to open or close the door.
No, a doorknob is not a pulley. A pulley is a simple machine that consists of a grooved wheel and a rope or belt that runs along the groove to lift or move objects. On the other hand, a doorknob is a type of door handle used to open or close doors.
A lever.
lever
What type of simple machine is a bottle openerLever: Fulcrum, resistance, applied force.
incline plane
a spraying bottle
The doorknob is a type of wheel and axle simple machine. When you turn the knob, the wheel (the knob itself) rotates around the axle (the shaft it's attached to), allowing you to easily open or close the door.
mechanical