Michael P. answered • 02/28/16
Tutor
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PhD in Chemistry - Application of Physics to Chemical Systems
Ali,
Force has been defined by Newton as mass times acceleration, and acceleration is distance per second squared or distance per second per second.
Notice that C is mass distance per second per second. It has the traditional units of force.
You should recognize that E Newton is the standard name for the traditional unit of force.
You should recognize that joules in B Joule meter is a unit of energy or work and that work is the product of force over distance. Force could be calculated as work divided by distance, but in B work is multiplied by distance. So, B is not a unit of force.
You should recognize that watts in A Watt second per meter is a unit of power and that power is the ratio of work to time. Work could be calculated as power multiplied by time, that is, as watt seconds as in A. As above, force could be calculated from work dividing it by distance, that is, watt seconds per meter, which is what is presented in A and is a force.
Finally, you should recognize that pascals is a unit of pressure and that pressure is force per area or force per distance squared or force per distance per distance. Force, then, could be calculated by multiplying pressure by area and would have units pascal meters squared, as it does in D Pascal meter meter.
The only units in the list that cannot be used to label force is B Joule meter.
Michael.
