A lever is a simple mechanism that uses a bar to pivot around a fixed point called a fulcrum. Levers can be joined together to form linkages. Simple linkages can be used to change the direction of ...
The first part of the night will see lengthy clear spells and just the odd patch of cloud. During the early hours, areas of variable cloud will drift by, but it will stay dry throughout. Saturday ...
Key fact When a lever is balanced it has equilibrium - the load is balanced on either side. A crowbar is an example of a first order lever that puts the load closer to the fulcrum - this gives it ...