20. In simple harmonic motion, the speed is greatest at the point in the cycle w

Question

20. In simple harmonic motion, the speed is greatest at the point in the cycle when a.) The kinetic energy is a minimum. b.) The potential energy is a maximum. c.) The magnitude of the acceleration is a maximum. d.) The displacement is a maximum e.) The magnitude of the acceleration is a minimum. 21. A box on a horizontal table is given an initial velocity of 5 m/s. It slides across a rough surface coming to rest in 2 m. The coefficient of kinetic friction is closest to a.) 0.4 b.) 0.2 c.) 1.3 d.) 0.6 e.) 0.8

Explanation / Answer

20) The magnitude of accleration is minimum.

21) mu=v^2/2gx=25/2(9.8)(2)=0.6

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