A world of machines

Question 1

Load

Answer 1

Load: force, such as the weight of an object, resisting motion against which a lever works

Question 2

Effort

Answer 2

Effort: force used to cause movement

Question 3

First-class lever

Answer 3

First-class lever: lever with the fulcrum between the effort and the load

Question 4

Force multipliers

Answer 4

Force multipliers: simple machine that supplies a greater force than the effort used. The effort must be applied over a greater distance than the load is moved

Question 5

Second-class levers

Answer 5

Second-class levers: lever with the load between the effort and the fulcrum

Question 6

Mechanical advantage

Answer 6

Mechanical advantage: the advantage of force-multiplying levers or other machines as defined by load/effort

Question 7

Third-class levers

Answer 7

Third-class levers: lever with the effort between the load and the fulcrum

Question 8

Speed multipliers

Answer 8

Speed multipliers: simple machine that increases the speed of an object. The effort applied must be greater than the load but applied over a shorter distance

Question 9

Fulcrum

Answer 9

Fulcrum: point around which a lever turns