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17 December, 14:14

A particle is moving on a straight line in such a way that its velocity v is given by v (t) = 2 t + 1 for 0 ≤ t ≤ 5 where t is measured in seconds and v in meters per second. What is the total distance traveled (in meters) by the particle between times t = 0 seconds and t = 5 seconds? (Do not enter the units)

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  1. 17 December, 17:19
    0
    30

    Step-by-step explanation:

    Given the velocity of a particle to be;

    V (t) = 2t+1

    To get the distance travelled by the particle, we will use the formula

    Velocity/speed = Distance/time

    V = dS/dt

    dS = Vdt ... 1

    Substituting the value of the velocity function into equation 1, we have;

    dS = (2t+1) dt

    Integrating both sides to get the distance S, we have;

    ∫dS = ∫ (2t+1) dt

    S = 2t²/2+t + C

    S (t) = t²+t+C

    To get the total distance travelled between the times t=0 and t=5, we will plug the value of t = 0 and t=5 into the function of the distance and then subtract as shown;

    S (0) = 0²+0

    S (0) = 0

    Also

    S (5) = 5²+5

    S (5) = 25+5

    S (5) = 30

    Distance travelled between both times will be S (5) - S (0)

    = 30-0

    = 30
  2. 17 December, 17:29
    0
    The total distance traveled by the particle is S = 30.

    Step-by-step explanation:

    Given that velocity,

    v (t) = 2t + 1

    To find the total distance travel, we integrate the velocity function, v (t), to obtain the distance function s (t), and evaluate the resulting distance at the interval given. That is at t = 0 to t = 5.

    Integrating v (t) with respect to t, we have

    s (t) = t² + t + C.

    At t = 5

    s (5) = 5² + 5 + C

    = 25 + 5 + C

    = 30 + C

    At t = 0

    S (0) = 0 + 0 + C

    = C

    The required distance is now

    S (5) - S (0)

    = 30 + C - C

    = 30.
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