問題詳情

26. A particle is in motion according to the equation y = (60 cm) cos (8t + π/8) where t is in seconds. Find the speed of the particle when it is at a point 20 cm from theequilibrium position. Answers in cm/s.
(A) 453
(B) 56.6
(C) 320
(D) 142

參考答案

答案:A
難度:適中0.571429
統計:A(4),B(0),C(0),D(0),E(0)

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