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What is a device that makes work easier by changing the size and direction of the force?
Single fixed pulley
Third-class lever
machine
fulcrum
first-class lever
mechanical efficiency
work output
friction
What is a simple machine that has a grooved wheel that holds a rope and provides a mechanical advantage of one?
Single fixed pulley
Third-class lever
machine
fulcrum
first-class lever
mechanical efficiency
work output
friction
What is the fixed point on a lever called?
Single fixed pulley
Third-class lever
machine
fulcrum
first-class lever
mechanical efficiency
work output
friction
Work done by a machine on an object is called....
Single fixed pulley
Third-class lever
machine
fulcrum
first-class lever
mechanical efficiency
work output
friction
Tweezers are a good example of....
Single fixed pulley
Third-class lever
machine
fulcrum
first-class lever
mechanical efficiency
work output
friction
What is the comparison of a machine's work output and work input
Single fixed pulley
Third-class lever
machine
fulcrum
first-class lever
mechanical efficiency
work output
friction
What kind of machine is a see-saw?
Single fixed pulley
Third-class lever
machine
fulcrum
first-class lever
mechanical efficiency
work output
friction
What prevents a machine from being 100 % efficient?
Single fixed pulley
Third-class lever
machine
fulcrum
first-class lever
mechanical efficiency
work output
friction
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