Problem 2. 4.6 The homogencous triangular plate has a mass of 12kg. Draw the FBD of the plate for each set of supports shown in (a)–(d) and determine the number of unknowns. 210 mm Friction 120 mm Friction Frictionless B 609 | 30° (a) Friction (d) (c) Fig. P4.6

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Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”