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Unformatted text preview: lim (kl9356) Homework 10 Weathers (17104) 1 This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points A spring with a spring-constant 3 . 5 N / cm is compressed 31 cm and released. The 4 kg mass skids down the frictional incline of height 27 cm and inclined at a 18 angle. The acceleration of gravity is 9 . 8 m / s 2 . The path is frictionless except for a dis- tance of 0 . 7 m along the incline which has a coefficient of friction of 0 . 5 . 4 kg 18 = . 5 . 7 m 27 cm 31 cm k = 3 . 5 N / cm v f Figure: Not drawn to scale. What is the final velocity v f of the mass? Answer in units of m / s. 002 (part 1 of 2) 10.0 points At time t i , the kinetic energy of a particle is 19 . 6 J and its potential energy is 11 . 5 J. At some later time t f , its kinetic energy is 24 J....
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