New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    A car increases its speed from 10 m/s to 30 m/s in 5

    seconds. What is its acceleration?  
    A 4 m/s² Correct Answer Incorrect Answer
    B 5 m/s² Correct Answer Incorrect Answer
    C 6 m/s² Correct Answer Incorrect Answer
    D 3 m/s² Correct Answer Incorrect Answer

    Solution

    Acceleration a = (v - u)/t = (30 - 10)/5 = 20/5 = 4 m/s²   This is uniform acceleration, meaning speed increases evenly.  

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