Chapter 14 Simple Machines Test Flashcards


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1

a slanted surface used to raise an object is a(n) ______________________

inclined plane

2

NW/W: carrying laundry to the washing machine

not work

3

NW/W: pushing a box from the bottom of a hill to the top of the hill

Work

4

NW/W: pulling a sled across a field covered with snow

work

5

NW/W: lifting a book bag off the floor

work

6

NW/W: carrying a ball

not work

7

NW/W: throwing a ball

work

8

NW/W: hitting a ball

work

9

NW/W: dropping a ball

work

10

a device that does work with only one movement and changes the size or direction of a force is a(n) ________________________

simple machine

11

a bar that is free to pivot about a fixed point is a __________

lever

12

the rate at which work is done is called ___________

power

13

an inclined plane with two sloping sides forms a machine called a __________

wedge

14

an inclined plane wrapped around a cylinder post is a _______

screw

15

a winding mountain road is an example of a(n) ________

screw

16

when two or more simple machines work together, they are called a(n) __________________________

compound machine

17

an object is moving due west. you push the object due west. is work being done?

yes

18

which of the following is a moving inclined plane? (a see-saw, a staircase, a pulley, a wedge)

wedge

19

the effort force you exert is the _________ force

input

20

the effort force a machine exerts is the ____________ force

output

21

the mechanical advantage that makes work easiest is one that is ________ (large, small, or zero)

large

22

in order for work to be done, what two things MUST be in the same direction?

force and motion

23

a _______ is an inclined plane wrapped around a cylinder

screw

24

what is the difference between a wedge and an inclined plane?

wedge is a moving inclined plane

25

C/S: lawnmower

compound

26

C/S: wheel and axle

simple

27

C/S: see-saw

simple

28

C/S: shovel

simple

29

C/S: can opener

compound

30

C/S: bicycle

compound

31

C/S: baseball bat

simple

32

C/S: tooth

simple

33

C/S: can

compound

34

6S: knife

wedge

35

6S: wheelchair ramp

inclined plane

36

6S: threaded bolt

screw

37

6S: teeth

wedge

38

6S: leaf rake

lever

39

6S: door knob

wheel and axle

40

6S: window blinds

pulley

41

6S: nail

screw