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