6.4 Integral Applications
Force and Work Applications
Question #1 (Easy): Work Done Based on Constant Force
The key is to differentiate the components that represent the force needed to calculate the work done.
The equations are:
For work done, first the force needs to be calculated because it is used as input for work calculation.
In the International metric system, force is in Newton ( ), distance is in meters ( ); therefore work is in
(called Joule ). In the US metric system, force is in pounds ( , fundamental unit of force),
distance is in feet ( ); therefore work is in foot-pound ( ).
Keeping track of the units is very important.
How much work is done to lift an elephant