The position of a mass that is oscillating on a spring is given by x = (12.3 cm) cos[(1.26s-1)t]. What is the velocity of the mass when t = 0.815 s?

A)

- 13.3 cm/s

B)

13.3 cm/s

C)

8.02 cm/s

D)

- 8.02 cm/s

E)

0 cm/s


A

Physics & Space Science

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