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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
inclined plane
B
efficiency board
C
screw
D
effort ramp
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
simple machine
C
screw
D
effort machine
3) A bar that is free to pivot about a fixed point is a ____.
A
lever
B
ramp
C
wedge
D
fulcrum
4) The rate at which work is done is called ____.
A
force
B
effort time
C
power
D
efficiency
5) The amount by which a machine multiplies an effort force is called the ____.
A
resistance force
B
mechanical advantage
C
efficiency factor
D
fulcrum
6) An inclined plane with one or two sloping sides forms a machine called a ____.
A
pulley
B
lever
C
ramp
D
wedge
7) A machine that changes only the direction of a force has a mechanical advantage ofВ ____.
A
1
B
5
C
10
D
100
8) Two simple machines that are part of a bicycle are a(n)____.
A
inclined plane and lever
B
inclined plane and wedge
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
fixed pulley
B
simple pulley
C
block and tackle
D
movable pulley
10) When two or more simple machines work together, they are called a(n)____.
A
simple machine
B
effort machine
C
screw
D
compound machine
*select an answer for all questions
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