Sketch a ramp with a height of 10.0 m and has an inclination angle of 30.0°. A 12.0 kg block sitting atop the ramp is initially at rest. Sketch the block’s free body diagram. Assuming the ramp’s surface is frictionless, calculate the block’s acceleration and velocity when it reaches the base of the ramp. How  much force did the block experience down the ramp? What must the coefficient of static friction be in order for the block to not move?

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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!