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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
screw
C
effort ramp
D
efficiency board
2) A device that does work with only one movement and changes the size or direction of a force is a(n)В ____.
A
screw
B
compound machine
C
effort machine
D
simple machine
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
efficiency
C
force
D
power
5) The amount by which a machine multiplies an effort force is called the ____.
A
efficiency factor
B
mechanical advantage
C
fulcrum
D
resistance force
6) An inclined plane with one or two sloping sides forms a machine called a ____.
A
wedge
B
pulley
C
lever
D
ramp
7) A machine that changes only the direction of a force has a mechanical advantage ofВ ____.
A
10
B
1
C
100
D
5
8) Two simple machines that are part of a bicycle are a(n)____.
A
gear and a wheel and axle
B
inclined plane and lever
C
inclined plane and wedge
D
screw and inclined plane
9) An arrangement of pulleys designed to reduce the effort force is called a ____.
A
fixed pulley
B
block and tackle
C
movable pulley
D
simple pulley
10) When two or more simple machines work together, they are called a(n)____.
A
effort machine
B
simple machine
C
compound machine
D
screw
*select an answer for all questions
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