two children wrestle over a toy of mass 1.5kg. the boy pulls with a force of 6.0 N (W) while the girl pulls with a force of 8.0 N (E). the toy slides with an acceleration of 1.0 m/s. Determine the value of the frictional force acting on the toy.

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!