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Q. The force exerted by the wind on the sails of a sailboat is 490 N north. The water exerts a force of 250 N east. If the boat (including its crew) has a mass of 300 kg, what are the magnitude and direction of its acceleration?

Q. A charge moves a istance of 2.0cm in the direction of a uniform electric field having a magnitude of 228 N/C. the electrical potential energy of the charge decreases by 45.0523*10^-19 J as it moves. find the magnitude of the charge on the moving particle.

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