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14 June, 09:32

A tractor ploughing a field accelerates at 2 m/s2

for 10 metres, after which its velocity is 7 m/s.

Calculate the tractor's velocity before it started accelerating.

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Answers (1)
  1. 14 June, 10:55
    0
    3 m/s

    Explanation:

    Given:

    a = 2 m/s²

    Δx = 10 m

    v = 7 m/s

    Find: v₀

    v² = v₀² + 2a (x - x₀)

    (7 m/s) ² = v₀² + 2 (2 m/s²) (10 m)

    v₀ = 3 m/s
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