Handwritten Only. Two children pull a third child backwards on a snow-saucer sled exerting forces f1=10.5 N and f2= 8.5 N. Note that the direction of the friction force, F= 5.4 N, is unspecified; it will be opposite in direction to the sum of the other two forces. A) Find the magnitude, in meters per squared second, of the acceleration of the 44kg sled and child system. B) Let east be towards the right of the sketch, and let north be towards the top of the sketch. Assuming the sled starts at rest, find the direction of the velocity in degrees north of east.

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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!