what are the two ways machines make work easier?
by changing the size and/or the direction of the force
what is a pulley?
a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rop
what family does the pulley belong to and why?
the lever family because it raises and lowers objects
how do you find the ideal mechanical advantage?
the number of newtons ÷ the number of support strands
how do you find the mechanical advantage
resistance force ÷ effort force
machines the do one movement
lever, pulley, and wheel and axle
force x distance
machine in which there is no friction
out-put and in-put forces
single fixed pulley
pulley does not move
single movable pulley
pulley does move
ideal mechanical advantage
the number of support strands
the ropes holding/attached to the pulley