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A force acting on an object does no work if
some work input is lost to friction
an automobile steering wheel
increases its efficiency
is less than the ideal mechanical advantage of the machine
the force is not in the direction of the object's motion
300 W
by changing the direction of your force
5
In which of the following is an example of a wheel and axle?
some work input is lost to friction
an automobile steering wheel
increases its efficiency
is less than the ideal mechanical advantage of the machine
the force is not in the direction of the object's motion
300 W
by changing the direction of your force
5
Reducing friction in a machine
some work input is lost to friction
an automobile steering wheel
increases its efficiency
is less than the ideal mechanical advantage of the machine
the force is not in the direction of the object's motion
300 W
by changing the direction of your force
5
If you exert a force of 300 N to walk 10 m up a flight of stairs in 10 sec, how much power do you use?
some work input is lost to friction
an automobile steering wheel
increases its efficiency
is less than the ideal mechanical advantage of the machine
the force is not in the direction of the object's motion
300 W
by changing the direction of your force
5
The actual mechanical advantage of a machine
some work input is lost to friction
an automobile steering wheel
increases its efficiency
is less than the ideal mechanical advantage of the machine
the force is not in the direction of the object's motion
300 W
by changing the direction of your force
5
The efficiency of a machine is always less than 100% because
some work input is lost to friction
an automobile steering wheel
increases its efficiency
is less than the ideal mechanical advantage of the machine
the force is not in the direction of the object's motion
300 W
by changing the direction of your force
5
3730 watts equals about how many horsepower?
some work input is lost to friction
an automobile steering wheel
increases its efficiency
is less than the ideal mechanical advantage of the machine
the force is not in the direction of the object's motion
300 W
by changing the direction of your force
5
How can a machine make work easier for you?
some work input is lost to friction
an automobile steering wheel
increases its efficiency
is less than the ideal mechanical advantage of the machine
the force is not in the direction of the object's motion
300 W
by changing the direction of your force
5
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