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Work And Machines
Test Description: Integrated science
Instructions: Answer all questions to get your test result.
1) A slanted surface used to raise an object is a(n) ____.
A
efficiency board
B
screw
C
effort ramp
D
inclined plane
2) A device that does work with only one movement and changes the size or direction of a force is a(n)В ____.
A
compound machine
B
effort machine
C
simple machine
D
screw
3) A bar that is free to pivot about a fixed point is a ____.
A
fulcrum
B
lever
C
wedge
D
ramp
4) The rate at which work is done is called ____.
A
effort time
B
power
C
force
D
efficiency
5) The amount by which a machine multiplies an effort force is called the ____.
A
efficiency factor
B
fulcrum
C
resistance force
D
mechanical advantage
6) An inclined plane with one or two sloping sides forms a machine called a ____.
A
ramp
B
pulley
C
wedge
D
lever
7) A machine that changes only the direction of a force has a mechanical advantage ofВ ____.
A
100
B
5
C
10
D
1
8) Two simple machines that are part of a bicycle are a(n)____.
A
inclined plane and wedge
B
inclined plane and lever
C
gear and a wheel and axle
D
screw and inclined plane
9) An arrangement of pulleys designed to reduce the effort force is called a ____.
A
movable pulley
B
block and tackle
C
fixed pulley
D
simple pulley
10) When two or more simple machines work together, they are called a(n)____.
A
screw
B
compound machine
C
simple machine
D
effort machine
*select an answer for all questions
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