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If the work output of a machine is always less than the work input, where does the missing work go?
it is used to overcome the friction created by the machine
power
a school crossing gurad raises a stop sign to weigh 10 N
pulley
Less force is needed to move the object over a longer distance
inclined planes and levers
which has a larger input force
power
A machine with a grooved wheel that holds a cable
it is used to overcome the friction created by the machine
power
a school crossing gurad raises a stop sign to weigh 10 N
pulley
Less force is needed to move the object over a longer distance
inclined planes and levers
which has a larger input force
power
By conparing the mechanical advantage of two machines, what can you tell about the machine?
it is used to overcome the friction created by the machine
power
a school crossing gurad raises a stop sign to weigh 10 N
pulley
Less force is needed to move the object over a longer distance
inclined planes and levers
which has a larger input force
power
How does a ramp make lifting a heavy object easier?
it is used to overcome the friction created by the machine
power
a school crossing gurad raises a stop sign to weigh 10 N
pulley
Less force is needed to move the object over a longer distance
inclined planes and levers
which has a larger input force
power
If an identical stack of books is lifted the same distance and one person does the job twice as fast, which of the following is done twice as much?
it is used to overcome the friction created by the machine
power
a school crossing gurad raises a stop sign to weigh 10 N
pulley
Less force is needed to move the object over a longer distance
inclined planes and levers
which has a larger input force
power
In which situation is a person doing work on an object?
it is used to overcome the friction created by the machine
power
a school crossing gurad raises a stop sign to weigh 10 N
pulley
Less force is needed to move the object over a longer distance
inclined planes and levers
which has a larger input force
power
The rate at which energy is transferred
it is used to overcome the friction created by the machine
power
a school crossing gurad raises a stop sign to weigh 10 N
pulley
Less force is needed to move the object over a longer distance
inclined planes and levers
which has a larger input force
power
Which of the following are simple machines used by Eqyptians to build pyramids?
it is used to overcome the friction created by the machine
power
a school crossing gurad raises a stop sign to weigh 10 N
pulley
Less force is needed to move the object over a longer distance
inclined planes and levers
which has a larger input force
power
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