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A device that changes the size or direction of force used to do work is called a(an) _______
compound
Class 1
input
is made up of two or more simple machines that operate together
machine
increase
2.5
less than
The mechanical efficiency of any machine is always _____ than 100%.
compound
Class 1
input
is made up of two or more simple machines that operate together
machine
increase
2.5
less than
The bottle opener is what type of a lever?
compound
Class 1
input
is made up of two or more simple machines that operate together
machine
increase
2.5
less than
The force that is exerted on a machine is called the __________ force.
compound
Class 1
input
is made up of two or more simple machines that operate together
machine
increase
2.5
less than
A machine is classified as a compound machine if it
compound
Class 1
input
is made up of two or more simple machines that operate together
machine
increase
2.5
less than
2 or more simple machines working together to make up a(an) ______ machine
compound
Class 1
input
is made up of two or more simple machines that operate together
machine
increase
2.5
less than
Besides a reduction in friction, the only way to increase the amount of work output of a machine is to _______ the work input
compound
Class 1
input
is made up of two or more simple machines that operate together
machine
increase
2.5
less than
A 100 m long ski lift carries skiers from a station at the foot of a slope to a second station 40 m above. What is the IMA of the lift?
compound
Class 1
input
is made up of two or more simple machines that operate together
machine
increase
2.5
less than
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