machines around us

Question	Answer
what force is needed to get a job done?	'effort'
what is a load	the force that a lever is used to overcome
what is a fulcrum	the point about which a lever points
lever	simple machine consisting of a rigid rod that pivots about a point
first class lever	lever with effort and loads at each end and fulcrum in the centre
mechanical advantage	ratio of a load force to the effort force used by a machine
what do machines do	they make tasks easier
which tasks do machines make easier	changing the size of thing, making things speed up, changing the direction of a force.
how does a machine help us lift a car	with a jack, it lifts up the car.
what is a speed multiplier	machine that requires a small movement of an effort to produce a large movement of a load.
what is a second class lever	lever with the flucrum located at one end the effort
how does a machine change the direction of a force	you pull the cable down and a pulley changes the direction

Resource summary

	Created by hey m8 over 7 years ago