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If two objects do the same amount of work, but one does it in less time.
The faster one has more power.
3.47
25.9 %
the ratio between output force and input force
no
do 1 J of work in 1 s.
380 J
force, distance
Work is done when a _____ is exerted on an object and the object moves a _____.
The faster one has more power.
3.47
25.9 %
the ratio between output force and input force
no
do 1 J of work in 1 s.
380 J
force, distance
When you hold something, are you doing work?
The faster one has more power.
3.47
25.9 %
the ratio between output force and input force
no
do 1 J of work in 1 s.
380 J
force, distance
A father lifts his daughter repeatedly in the air. How much work does he do with each lift, assuming he lifts her 2.0 m and exerts an average force of 190 N?
The faster one has more power.
3.47
25.9 %
the ratio between output force and input force
no
do 1 J of work in 1 s.
380 J
force, distance
A watt is the amount of power required to
The faster one has more power.
3.47
25.9 %
the ratio between output force and input force
no
do 1 J of work in 1 s.
380 J
force, distance
What is the efficiency of a machine if 55.3 J of work are done on the machine, but only 14.3 J of work are done by the machine?
The faster one has more power.
3.47
25.9 %
the ratio between output force and input force
no
do 1 J of work in 1 s.
380 J
force, distance
Mechanical advantage is
The faster one has more power.
3.47
25.9 %
the ratio between output force and input force
no
do 1 J of work in 1 s.
380 J
force, distance
A roofer needs to get a stack of shingles onto a roof. Pulling the shingles up manually used 1549 N of force. Using a system of pulleys requires 446 N. What is the mechanical advantage?
The faster one has more power.
3.47
25.9 %
the ratio between output force and input force
no
do 1 J of work in 1 s.
380 J
force, distance
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