A car is travelling at 27m/s and decelerates at a=5m/s2 for a distance of 10m. Calculate its final velocity. (Hint does deceleration imply t

Question

A car is travelling at 27m/s and decelerates at a=5m/s2 for a distance of 10m. Calculate its final velocity. (Hint does deceleration imply that the acceleration is positive or negative?)

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Bình An 3 years 2021-08-11T14:32:47+00:00 1 Answers 11 views 0

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  1. thongdat2
    0
    2021-08-11T14:33:55+00:00
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    If deceleration = 5 m/s²

    then acceleration = -5 m/s²

    According to third law of motion,

    = v² = 2as + u²

    = v² = 2×-5×10 + 27²

    = v² = -100 + 729

    = v =√ 629

    = 25.08 m/s

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