Three children are pulling on a toy box (5.5kg). Emma pulls with a force of 23N[E45N] Miguel pulls with a force of 41N[S30W] and Irma pulls with a force of 17N [N15W]  what is the net force on the toy box? what is the acceleration of the toy box?  whay is the velocity of the toy box 0.6 sec after children

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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!