If for every action force an equal and opposite reaction force exlsts, how can anything ever be accelerated? The action and reaction forces act on different objects, therefore the net force is not always zero.
The action force, when accelerating, is greater than the reaction force.
The reaction force is not always in the same vector direction as the action force.
none of the above
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DANALITIN

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).

Which of the following are found in plant cells buh not animal cells?

Two point charges lie on the x axis. a charge of + 2.30 pc is at the origin, and a charge of − 4.50 pc is at x=−11.0cm. what third charge should be placed at x=+26cm so that the total electric field at x=+13.0cm is zero? express your answer to three significant figures and include appropriate units.