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13-9. The crate has a mass of 80 kg and is being towed by
Chapter 13, Problem 13-9(choose chapter or problem)
QUESTION:
13-9. The crate has a mass of 80 kg and is being towed by a chain which is always directed at 20 from the horizontal as shown. If the magnitude of P is increased until the crate begins to slide, determine the crates initial acceleration if the coefficient of static friction is /xv = 0.5 and the coefficient of kinetic friction is fik = 0.3.
Questions & Answers
QUESTION:
13-9. The crate has a mass of 80 kg and is being towed by a chain which is always directed at 20 from the horizontal as shown. If the magnitude of P is increased until the crate begins to slide, determine the crates initial acceleration if the coefficient of static friction is /xv = 0.5 and the coefficient of kinetic friction is fik = 0.3.
ANSWER:Using the equation of static friction:
F_s = u_s *N
N = m*g = 80 kg * 9.81 m/s^2 = 786