ch 14 work and power
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13 Terms
since work can mean different things to different people, ____ must clearly define what work means
scientists
what are the 2 conditions that must happen for work to be done on an object?
a force must be applied to the object
the object must move in the direction of the applied force
what is the formula for work
w=fd
force units
N
distance units
m
work units
Joules
defined as the amount of work done in a given amount of time
power
usually people like to get thigs done quickly therefore they increase the power either by
_____ or
_____
increase the amount of work
do the work quicker
equation for power
p=w/t
power units
Watts
another unit for power usually used to describe the power of engines
horsepower
1hp = ___ watts
750
