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If you know the input distance and the output distance of a machine, which of the following can you calculate?
by changing the direction of your force
10
5
3 horsepower motor
50%
increases its efficiency
the force is not in the direction of the object's motion
ideal mechanical advantage
Reducing friction in a machine
by changing the direction of your force
10
5
3 horsepower motor
50%
increases its efficiency
the force is not in the direction of the object's motion
ideal mechanical advantage
3730 watts equals about how many horsepower?
by changing the direction of your force
10
5
3 horsepower motor
50%
increases its efficiency
the force is not in the direction of the object's motion
ideal mechanical advantage
If you have to apply 10 N of force on a crowbar to lift a rock that weighs 100 N, what is the actual mechanical advantage of the crowbar?
by changing the direction of your force
10
5
3 horsepower motor
50%
increases its efficiency
the force is not in the direction of the object's motion
ideal mechanical advantage
A force acting on an object does no work if
by changing the direction of your force
10
5
3 horsepower motor
50%
increases its efficiency
the force is not in the direction of the object's motion
ideal mechanical advantage
A 1,125 W motor might also be rated as a
by changing the direction of your force
10
5
3 horsepower motor
50%
increases its efficiency
the force is not in the direction of the object's motion
ideal mechanical advantage
How can a machine make work easier for you?
by changing the direction of your force
10
5
3 horsepower motor
50%
increases its efficiency
the force is not in the direction of the object's motion
ideal mechanical advantage
A mechanical device requires 300 J of work to do 150 J of work in lifting a crate. What is the efficiency of the device?
by changing the direction of your force
10
5
3 horsepower motor
50%
increases its efficiency
the force is not in the direction of the object's motion
ideal mechanical advantage
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