
Simple Machines and Efficiency
Authored by Lisa Thompson
Science
8th Grade
NGSS covered

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
the ratio of output force to input force
work
mechanical advantage
efficiency
power
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
the percentage of the input work that is converted to output work
mechanical advantage
efficiency
joule
machine
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
a simple machine that is a flat, sloped surface
inclined plane
wedge
lever
fulcrum
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
a device that is thick at one end and tapers to a thin edge at the other end
wedge
inclined plane
lever
fulcrum
Tags
NGSS.MS-PS2-2
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
a rigid bar that is free to pivot, or rotate, on a fixed point
wedge
inclined plane
lever
fulcrum
Tags
NGSS.MS-PS2-2
NGSS.MS-PS2-1
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
a simple machine that acts like an inclined plane wrapped around a cylinder
screw
pulley
fulcrum
compound machine
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
a simple machine made of two circular or cylindrical objects fastened together that rotate about a common axis
wheel and axle
pulley
screw
compound machine
Tags
NGSS.MS-PS2-1
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