Each force must be represented by a distinct arrow starting on, and pointing away from, the dot. The relative lengths of all arrows reflect the relative magnitudes of the forces.
1) Weight,
2) Normal and
3) Friction
Several forces are present along a circular path on the block; the lowest point of the path has the following forces:
1) The pull of the Earth on the body, or weight, is directed vertically and downward.
2) The Earth's natural response to the support of the body is a vertical upward motion.
3) If there is friction on the track that is horizontally oriented and directed in the opposite direction from the direction of travel.
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