A particle P travels in a straight line, starting at rest from a point O. The acceleration of P at time t s after leaving O is denoted by a ms⁻², where a = 0.3t² for 0 ≤ t ≤ 4, a = -kt⁻³ᐟ² for 4

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A particle P travels in a straight line, starting at rest from a point O. The acceleration of P at time t s after leaving O is denoted by a ms⁻², where a = 0.3t² for 0 ≤ t ≤ 4, a = -kt⁻³ᐟ² for 4 < t < T, where k and T are constants.

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A particle P travels in a straight line, starting at rest from a point O. The acceleration of P at time t s after leaving O is denoted by a ms⁻², where a = 0.3t² for 0 ≤ t ≤ 4, a = -kt⁻³ᐟ² for 4 < t < T, where k and T are constants.

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