What class lever is a door knob?

Answer 1

second class lever

Answer 2

A door is a second class lever because the fulcrum (hinges) are at one end, the resistance (the weight of the door itself) is in the middle, and the effort (the work done on the door--your hand pushes) is at the other end fulcrum<----resistance (door)---->effort = second class lever. fulcrum<----effort---->resistance = third class lever (example is something like a hockey stick where the distance is larger at the resistance end)

Answer 3

A car door is a second class lever. The fulcrum is the hinges, the input force is the person opening the door, the output force is the way the car door swings, the bar is the door, and the load is the force put on the door.

Answer 4

when you talk of basic machines there are

levers

and

wheel and axle

if the rim of the wheel(doorknob) is considered the long end of the lever

and the center of the Axel the fulcrum it can be stated its the same basic machine

if you consider the edge of the axle to be the fulcrum you get the same answer

this is called plane of reference or point of view

some doorknobs look like levers some look like wheels

so it is your choice

Answer 5

The hinges act as a fulcrum, the door is the load, and you apply the force on the opposite edge of the door (where the knob is). A class 2 lever has the load between the fulcrum and the force.

Answer 6

It's class 2 ;)

Answer 7

second kind of lever

Answer 8

Second or third cant remember which.