Levers Part One

• Physics

Levers - 3 HAVO

Fulcrum/pivot

Right Arm

Left Arm

Force on the right

Force on the left

Variables               

r = Distance from the pivot until the force in meters

F = amount of force (often equal to Fg) in Newton

M= Moment in Nm

M= F x r

Fulcrum/pivot

Right Arm

Left Arm

Force on the right

Force on the left

The law of levers

When a lever is balanced the following applies;

Mright= Mleft

On the right are the forces that go clockwise.
On the left are the force that go counterclockwise.

Force counterclockwise

Force clockwise

distance  clockwise

Distance counterclockwise

Which position would the lever take?

1. Jerry's side would be down
2. Tom's side would be down
3. It will be balanced

Assume that the following questions are balanced...

So M clockwise = M counterclockwise applied