science
Grade-9
Easy

Question

In which of the following does the body has the greatest velocity?

  1. During the first 5 seconds
  2. From 5 to 10 seconds
  3. After 10 seconds
  4. All of the above

hintHint:

After 10 seconds

The correct answer is: After 10 seconds


    After 10s the body has the greatest velocity.
    Justification:
    Before 5s
    V e l o c i t y space equals space 5 over 5 space equals space 1 m s to the power of negative 1 end exponent
    Between 5s to 10s-
    V e l o c i t y space equals space 0 over 5 space equals space 0 space m s to the power of negative 1 end exponent
    After 10s-
    V e l o c i t y space equals space fraction numerator 5 over denominator 2.5 end fraction space equals space 2 m s to the power of negative 1 end exponent

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