The image below shows a box with an applied force. The static coefficient of friction between the box and surface is 1.2. 19 kg 400 N 20° (a) Determine the magnitude of the applied force along the x axis. (b) Determine the normal force as the force is applied. mum

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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!