science
Grade-9
Easy

Question

The acceleration of the body whose v-t graph is given below is ____ m/s2.

  1. 4 over 5
  2. 12 over 7
  3. 7 over 12
  4. 5 over 4

hintHint:

The slope of the v-t graphs represents acceleration.

The correct answer is: 12 over 7


    a space equals space fraction numerator v subscript 2 space minus space v subscript 1 over denominator t subscript 2 space minus space t subscript 1 end fraction space
a space equals space fraction numerator 60 space minus space 0 space over denominator 50 space minus space 15 space end fraction
a space equals space 60 over 35 space equals space 12 over 7 space m s to the power of negative 2 end exponent

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