In order to make an adjustment, a group of engineering students remove leg D from a laboratory worktable. To ensure that the table remains stable, they place a 5.1-kg stack of statics textbooks centered at point E of the tabletop as shown. Determine the normal reaction force at each leg A, B, and C. The uniform tabletop has a mass of 45.6 kg, and each leg has a mass of 4.6 kg. 5.1 kg 0.6 m 0.3 m 1.6 m 0.7 m E B A Answers: NA= NB= i +--- Z Z N N N Nc=

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