My 5 kg cat wants to push his box of kitty chow off the table so it will spill a snack for his afternoon "tea". The box has a mass of 1 kg (that's 2.2 lb or 9.8 N of gravitational downward force) and the coefficient of friction with the tabletop is 0.25.  About how much force does he have to push with to get the box to begin to slide? Pick the closest answer to what you calculate using your understanding of static frictional forces. A. 9.8 N B. 25 N C. 2.2 lb D. 2.5 N

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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!