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If you perform 50 joules of work lifting a 5 N box from the floor to a shelf, how high is the shelf?
10 m
force
10
watt
5
2.0 J
increases its efficiency
some work input is lost to friction
Reducing friction in a machine
10 m
force
10
watt
5
2.0 J
increases its efficiency
some work input is lost to friction
The SI unit of power is the
10 m
force
10
watt
5
2.0 J
increases its efficiency
some work input is lost to friction
A machine is a device that can multiply
10 m
force
10
watt
5
2.0 J
increases its efficiency
some work input is lost to friction
The efficiency of a machine is always less than 100% because
10 m
force
10
watt
5
2.0 J
increases its efficiency
some work input is lost to friction
If you exert a force of 10 N to lift a box a distance of .2 m, how much work do you do?
10 m
force
10
watt
5
2.0 J
increases its efficiency
some work input is lost to friction
3730 watts equals about how many horsepower?
10 m
force
10
watt
5
2.0 J
increases its efficiency
some work input is lost to friction
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?
10 m
force
10
watt
5
2.0 J
increases its efficiency
some work input is lost to friction
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