chap 5 Flashcards
6 types of simple machines
lever pulley wheel and axle inclined planes screw wedge ge
simple machine
does work with only one movement
compound machines
two or more simple machines that operate together
wedge
an incline ned plane with one or to sloping sides
ex.knife
screw
an inclined plane wrapped around a cylindrical post
ex
lid on jar
wheel and axle
it consist of a shaft or axle attached to the center of a larger wheel o that they w&a rotate together
types of pulleys
fixed pulleys
movable pulleys
the block and tackle
the block and tackle
a system of plleys consist of fixed and movable pulleys
fixed pulley
attached to something that doesn’t move u such as a wall
movable pulley
one end of the rope is fixed and wheel is fixed tooo
lever
a bat that is free to pivot or turn around a fixed point
the fixed point of a lever is called
fulcrum
1st class lever
thee out put forces is located between the input and output
force
2nd class lever
the output force is located between the input force and the fulcrum
es.wheelbarrow
3rd class lever
the input force is applied b/w the output force and the fulcrum
ex baseball bat
machine
males doing work easier
input force Fin
the force applied to the machine
output force Fout
the force applied by the machine
input work (win)
the work being done to the machine
output work wout
the work being done by the machine
Work
the obj must move in the direction of the applied force
the amount of work donr per second
power
