A force

F acts in the x - direction, its magnitude given by F = ax^2, where x is in meters and a = 5.0N/m^2

. Find the work done by this force as it acts on a particle moving from x = 0 to x = 6.0 m.

Can a reaction force ever be greater or less than an applied force? Explain.

An example of a solution is

The nuclei of all atoms have A. positive charges B. negative charges C. no charges

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