all lever types Flashcards
what are levers
levers are tools that exert large force when applying a lesser force
what examples or levers
claw hammers
wheelbarrows
crow bars
claws
seesaws
why is the energy used on a lever the same as the force
the distance from the fulcrum increases making the energy the same
this is because the turning moments applied to the ends of a lever must be equal
what is torque
the turning moments of a lever
how is torque measured
in newton metres
how many classes of levers are there
3
what is the class 1 lever
when the force and the load are on different sides of the fulcrum.
the effectiveness of the force depends on the distance from the fulcrum(the greater the distance the more effective the force with be)
what is the class 2 lever
a lever that has the load in between the fulcrum and the force
give an example of a class 2 lever
wheelbarrow
what is a class 3 lever
this a lever that has the force between the load and the fulcrum
give an example of a class 3 lever
a humans arm
what is mechanical advantage
the advantage gained by the lever
how do you calculate the mechanical advantage
M=load/effort
how do you calculate the force of the load
force of load x distance from the fulcrum= force of effort x distance from fulcrum
