Exam-Style Problem

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June 2022 p43 q7
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A particle P moves in a straight line through a point O. The velocity v ms-1 of P, at time t s after passing O, is given by

\(v = \frac{9}{4} + \frac{b}{(t+1)^2} - ct^2,\)

where b and c are positive constants. At t = 5, the velocity of P is zero and its acceleration is \(-\frac{13}{12}\) ms-2.

\((a) Show that b = 9 and find the value of c.\)

\((b) Given that the velocity of P is zero only at t = 5, find the distance travelled in the first 10 seconds of motion.\)

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