An applied force of 89.4 N is used to accelerate an object across a frictional surface. The object has a weight of 61.2 N and encounters a frictional force of 76.7 N. (a) Draw a sketch of the object and show all of the forces acting on the object. (b) What is the net force acting on the object in the horizontal direction? (c) What is the net force acting on the object in the vertical direction? (d) Using Newton's 2nd Law, find the object's acceleration.

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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!