Latihan Formatif 8.1 Soalan 5

A particle moves along a straight line and passes through a fixed point O. Its acceleration, a ms^-2, at t seconds after passing through O is given by .Suatu zarah bergerak di sepanjang satu garis lurus dan melalui satu titik tetap O. Pecutannya, a ms^–2, pada masa t saat selepas melalui O diberi oleh . (a) Find the initial acceleration, in of ms^-2 the particle when . (a) Cari pecutan awal bagi zarah itu, dalam ms^–2.

(b) Determine the range of time, in seconds, when the velocity of the particle is decreasing. (b) Tentukan julat masa, dalam saat, apabila halaju zarah itu menyusut.