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Determine the acceleration from the first interval.

Physics

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Answer

3s\text{3s}

Step-by-step solution

3 steps
  1. Determine the acceleration from the first interval.

    The object starts from rest, so its initial velocity u=0u = 0.
    It moves with a constant acceleration, let's call it aa.
    In the first 2 seconds (t1=2t_1 = 2 s), it covers a distance s1=ss_1 = s.
    We use the kinematic equation: s=ut+12at2s = ut + \frac{1}{2}at^2.

    For the first 2 seconds:

    s1=ut1+12at12s_1 = u t_1 + \frac{1}{2} a t_1^2 s=(0)(2)+12a(2)2s = (0)(2) + \frac{1}{2} a (2)^2 s=0+12a(4)s = 0 + \frac{1}{2} a (4) s=2as = 2a

    From this, we can express the acceleration aa in terms of ss:

    a=s2a = \frac{s}{2}
  2. Calculate the total distance traveled in the first 4 seconds.

    The "next 2 seconds" means the interval from t=2t=2 s to t=4t=4 s. So, we need to find the total distance traveled from t=0t=0 to t=4t=4 s.
    Let StotalS_{total} be the total distance covered in ttotal=4t_{total} = 4 s.
    Using the same kinematic equation with u=0u=0 and a=s2a = \frac{s}{2}:

    Stotal=uttotal+12attotal2S_{total} = u t_{total} + \frac{1}{2} a t_{total}^2 Stotal=(0)(4)+12(s2)(4)2S_{total} = (0)(4) + \frac{1}{2} \left(\frac{s}{2}\right) (4)^2 Stotal=0+12(s2)(16)S_{total} = 0 + \frac{1}{2} \left(\frac{s}{2}\right) (16) Stotal=16s4S_{total} = \frac{16s}{4} Stotal=4sS_{total} = 4s
  3. Find the distance traveled in the next 2 seconds.

    The distance traveled in the next 2 seconds (snexts_{next}) is the total distance traveled in 4 seconds minus the distance traveled in the first 2 seconds.

    snext=Stotal−s1s_{next} = S_{total} - s_1 snext=4s−ss_{next} = 4s - s snext=3ss_{next} = 3s

    The object will travel 3s3s meters in the next 2 seconds.

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