Two tuning forks, 492 Hz and 498 Hz, are struck simultaneously. How many beats will be heard?
1 answer:
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The work done by a force is given by:
where
F is the magnitude of the force
d is the distance covered by the object
is the angle between the direction of the force and the direction of motion
In our problem,
, 
and 
(because the force is parallel to the direction of motion), so the work done by the crane is
where
F is the magnitude of the force
d is the distance covered by the object
In our problem,