Question

A race car starts from rest and speeds up uniformly to the right until it reaches a maximum velocity of 60m/s^2

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What is the acceleration of the race car?

Answers

  1. Question:

    A race car starts from rest and speed up uniformly to the right until it reaches a maximum velocity of 60m/s in 15 secs

    Answer:

    4m/s²

    Explanation:

    The acceleration of a body in uniform motion can be found by using one of the equations of motion as follows;

    v = u + at         ——————(i)

    Where;

    v = final velocity of the body

    u = initial velocity of the body

    a = acceleration of the body

    t = time taken for the motion

    From the question, the body is the race car and has the following:

    v = 60m/s²

    u = 0 [since the car starts from rest]

    t = 15 secs.

    Now, substitute these values into equation(i) as follows;

    60 = 0 + a(15)

    60 = 15a    [Divide through by 15]

    \frac{60}{15} = \frac{15a}{15}

    a = 4

    Therefore, the acceleration of the race car is 4m/s²

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