Question: 4 The position function of a moving object is s(r) = r-(7 - r). r 2 0, in metres, at time f, in seconds, a.

4 The position function of a moving object is s(r) = r-(7 - r). r 2 0, in metres, at time f, in seconds, a. Calculate the object's velocity and acceleration at any time r. b. After how many seconds does the object stop? c. When does the motion of the object change direction? d. When is its acceleration positive? e. When does the object return to its original position

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