Science:Math Exam Resources/Courses/MATH110/December 2017/Question 06 (b)/Statement

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A small ball is attached to a vertical spring hanging from the ceiling. Suppose you pull the ball (vertically) down towards the ground. At you let go and the ball begins to oscillate following the stretching and compression of the spring. Let

be the position of the ball (in metres) at time (in seconds) since it was released. Let the ground level be 0 m.

(b) What is the velocity of the ball at ?