Chapter 9 Simple Machines

Question 1

Lever

Answer 1

simple machine usually consisting of a long, rigid object that moves around a turning point when a force is applied

Question 2

Fulcrum

Answer 2

point around which a lever turns

Question 3

Inclined plane

Answer 3

simple machine that uses sloping surfaces to reduce the effort required for a task

Question 4

Wedges

Answer 4

simple machine, called an inclined plane, that reduces the force required to cut through objects or stop them from moving

Question 5

Screws

Answer 5

curved inclined plane

Question 6

Load

Answer 6

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

Question 7

Effort

Answer 7

force used to cause movement

Question 8

Wheel and axle

Answer 8

Wheel and axle: lever that can rotate. The effort applied to the outside of the wheel produces a greater force on the axle because the effort is moved over a longer distance

Question 9

Gears

Answer 9

toothed wheel that can turn other toothed wheels

Question 10

Driving gears

Answer 10

Gear that causes another to move

Question 11

Driven gears

Answer 11

Gear that causes another to move