Flashcards
machines around us
Flashcards do conjunto (12)
- 1what force is needed to get a job done?'effort'
- 2what is a loadthe force that a lever is used to overcome
- 3what is a fulcrumthe point about which a lever points
- 4leversimple machine consisting of a rigid rod that pivots about a point
- 5first class leverlever with effort and loads at each end and fulcrum in the centre
- 6mechanical advantageratio of a load force to the effort force used by a machine
- 7what do machines dothey make tasks easier
- 8which tasks do machines make easierchanging the size of thing, making things speed up, changing the direction of a force.
- 9how does a machine help us lift a carwith a jack, it lifts up the car.
- 10what is a speed multipliermachine that requires a small movement of an effort to produce a large movement of a load.
- 11what is a second class leverlever with the flucrum located at one end the effort
- 12how does a machine change the direction of a forceyou pull the cable down and a pulley changes the direction